# Flutter 1.9.1 發行說明 > Flutter 1.9.1 的發行說明。 哈囉，歡迎來到又一個 Flutter 穩定版（stable）通道發行說明。今年到目前為止，我們每季發行一個穩定版，完全符合[我們的計畫](https://github.com/flutter/flutter/blob/master/docs/releases/Flutter-build-release-channels.md)（其實與其說是計畫，不如說是目標，但到目前為止一切進展順利……）。這次是我們迄今規模最大的發行版，共有 116 位貢獻者合併了 620 個 Pull Request。與往常一樣，有趣的 PR 列在下方。此版本有許多值得討論的有趣事項，包括： * One regression fixed but also one added * Some breaking API changes * Some severe issues caught and fixed * Support for macOS Catalina and iOS 13 * A number of new features * And more! 需要說明的是，當我說「我們」時，我指的是整個 Flutter 社群。沒有所有貢獻者的支持，不論你的雇主是誰，Flutter 團隊絕不可能持續以如此規模成長。感謝大家的貢獻！ ## 迴歸問題 在本版本中，我們修正了一個迴歸問題（[37955](https://github.com/flutter/flutter/pull/37955) Update shader warm-up for recent Skia changes），但也引入了另一個（[38167](https://github.com/dart-lang/sdk/issues/38167) Incremental compiler re-issuing of errors from constant evaluator）。新引入的迴歸問題已在 1.9.1 穩定版（stable）通道發行後修正（[00d14e7](https://github.com/dart-lang/sdk/commit/00d14e7) [CFE] Always start constant evaluation error where we are asked to evaluate），若您遇到此問題，可選擇更新的建置版本以套用至您的 Flutter 應用程式。 ## 破壞性 API 變更 我們盡力避免破壞性變更，但在推動 Flutter 進入新場景與新平台的過程中，我們也不希望建立不直觀的 API。以下是本版本的破壞性變更，請參閱相關公告以更新您的程式碼。 [33281](https://github.com/flutter/flutter/pull/33281) ([announcement](https://groups.google.com/forum/#!msg/flutter-announce/ZmnseDOW9Wc/5K7xD0V8BwAJ)) Update TextStyle and StrutStyle height docs [34019](https://github.com/flutter/flutter/pull/34019) ([announcement](https://groups.google.com/forum/#!searchin/flutter-announce/34019%7Csort:date/flutter-announce/GBFULLQxGp4/-3uujTAaCgAJ)) Selectable Text [34665](https://github.com/flutter/flutter/pull/34665) ([announcement](https://groups.google.com/forum/#!searchin/flutter-announce/34665%7Csort:date/flutter-announce/W9KQKpf0Ves/6bdDq_U8CQAJ)) Selection handles position is off [35110](https://github.com/flutter/flutter/pull/35110) ([announcement](https://groups.google.com/forum/#!searchin/flutter-announce/35110%7Csort:date/flutter-announce/FHicLlzr9gQ/OM9KgLxMBwAJ)) Always test semantics [35136](https://github.com/flutter/flutter/pull/35136) ([announcement](https://groups.google.com/forum/#!searchin/flutter-announce/35136%7Csort:date/flutter-announce/UrhJwkaKaSc/ONoMzKrtAwAJ)) Update Dark Theme disabledColor to White38 [35785](https://github.com/flutter/flutter/pull/35785) ([announcement](https://groups.google.com/forum/#!searchin/flutter-announce/35785%7Csort:date/flutter-announce/AL5ure2NWNI/4gPoziQSBAAJ)) Remove reverseDuration from implicitly animated widgets, since it's ignored. [36030](https://github.com/flutter/flutter/pull/36030) ([announcement](https://groups.google.com/forum/#!searchin/flutter-announce/36030%7Csort:date/flutter-announce/bN6vFnoVpmk/7UCOxj6LCwAJ)) [Material] Implement TooltipTheme and Tooltip.textStyle, fix Tooltip debugLabel, update Tooltip defaults [36106](https://github.com/flutter/flutter/pull/36106) ([announcement](https://groups.google.com/forum/#!searchin/flutter-announce/36106%7Csort:date/flutter-announce/Yo3WxDCria4/AgNUznoZBgAJ)) Updated ColorScheme.dark() colors to match the Material Dark theme specification [36217](https://github.com/flutter/flutter/pull/36217) ([announcement](https://groups.google.com/forum/#!searchin/flutter-announce/36217%7Csort:date/flutter-announce/3vyI_41YX44/yQy0MHAuBgAJ)) Split Mouse from Listener [36402](https://github.com/flutter/flutter/pull/36402) ([announcement](https://groups.google.com/forum/#!searchin/flutter-announce/36402%7Csort:date/flutter-announce/taTeI07sK0w/-fsJvpfCFQAJ)) Teach render objects to reuse engine layers [36856](https://github.com/flutter/flutter/pull/36856) (no announcement) [Material] Implement TooltipTheme and Tooltip.textStyle, update Tooltip defaults [36964](https://github.com/flutter/flutter/pull/36964) ([announcement](https://groups.google.com/forum/#!searchin/flutter-announce/36964%7Csort:date/flutter-announce/IALsYuwhzNk/OaP1ijOhCwAJ)) Interactive size const [37338](https://github.com/flutter/flutter/pull/37338) ([announcement](https://groups.google.com/forum/#!searchin/flutter-announce/37338%7Csort:date/flutter-announce/ZNX-Rd6IKSQ/3K4-1_skDAAJ)) Update constructor APIs TooltipTheme, ToggleButtonsTheme, PopupMenuTheme [37341](https://github.com/flutter/flutter/pull/37341) (no announcement) hiding original hero after hero transition [37544](https://github.com/flutter/flutter/pull/37544) ([announcement](https://groups.google.com/forum/#!searchin/flutter-announce/37544%7Csort:date/flutter-announce/Igg0DuIO6Zg/2QroNaSkDAAJ)) Replace ButtonBar.bar method with ButtonBarTheme [37652](https://github.com/flutter/flutter/pull/37652) ([announcement](https://groups.google.com/forum/#!searchin/flutter-announce/37652%7Csort:date/flutter-announce/bTliCEss-VA/CfqN9DCWEwAJ)) Change RenderObject.getTransformTo to include ancestor. [37736](https://github.com/flutter/flutter/pull/37736) ([announcement](https://groups.google.com/forum/#!searchin/flutter-announce/37736%7Csort:date/flutter-announce/-kotruZbBDQ/vny4JjFmFQAJ)) Added a composable waitForCondition Driver/extension API ## 嚴重問題：崩潰、客戶關鍵與效能修正 在 Flutter 中，我們努力在每個發行版中提升品質。這次我們修正了數個嚴重問題，包括崩潰、客戶關鍵問題及效能問題。 [34907](https://github.com/flutter/flutter/pull/34907) Fixed LicensePage to close page before loaded the License causes an error [35223](https://github.com/flutter/flutter/pull/35223) Navigator pushAndRemoveUntil Fix [36097](https://github.com/flutter/flutter/pull/36097) Fix nested scroll view can rebuild without layout [37033](https://github.com/flutter/flutter/pull/37033) fix debug paint crash when axis direction inverted [37254](https://github.com/flutter/flutter/pull/37254) Clamp Scaffold's max body height when extendBody is true [34298](https://github.com/flutter/flutter/pull/34298) Preserving SafeArea : Part 2 [37718](https://github.com/flutter/flutter/pull/37718) Adding physicalDepth to MediaQueryData & TestWindow [35297](https://github.com/flutter/flutter/pull/35297) Fix the first frame logic in tracing and driver ## 新功能 此版本同時帶來兩個新的 Material 元件 (Widget)：ToggleButtons 元件（在 iOS 上稱為 [segmented control](https://developer.apple.com/design/human-interface-guidelines/ios/controls/segmented-controls/)）和 ColorFilter 元件（詳見下方「文字與無障礙」章節）。若想了解這些元件的實際效果，請參考簡短的 [ToggleButtons](https://github.com/csells/flutter_toggle_buttons) 與 [ColorFilter](https://github.com/csells/flutter_color_filter) 範例。此外，SelectableText 元件允許使用者選取唯讀文字。 [34599](https://github.com/flutter/flutter/pull/34599) [Material] ToggleButtons [34019](https://github.com/flutter/flutter/pull/34019) Selectable Text [35207](https://github.com/flutter/flutter/pull/35207) refactor out selection handlers [36030](https://github.com/flutter/flutter/pull/36030) [Material] Implement TooltipTheme and Tooltip.textStyle, fix Tooltip debugLabel, update Tooltip defaults [36411](https://github.com/flutter/flutter/pull/36411) Implement InputDecorationTheme copyWith, ==, hashCode [36856](https://github.com/flutter/flutter/pull/36856) [Material] Implement TooltipTheme and Tooltip.textStyle, update Tooltip defaults [36963](https://github.com/flutter/flutter/pull/36963) Add margins to tooltips [37266](https://github.com/flutter/flutter/pull/37266) Change the value of kMaxUnsignedSMI for the Web [37341](https://github.com/flutter/flutter/pull/37341) hiding original hero after hero transition [37492](https://github.com/flutter/flutter/pull/37492) Drawer edge drag width improvements ## macOS Catalina 支援 隨著 macOS Catalina 即將發行，我們確保工具鏈在您遷移至 Catalina、iOS 13 及 Xcode 11 的過程中能持續順暢運作。需要特別注意的是，**在升級至 Catalina 之前，請先升級至 Flutter 1.9.1 穩定版（stable）通道**。另一個順序也可行，但這樣做會看到一個錯誤（這個[錯誤](https://github.com/flutter/flutter/issues/33890)無害，但還是要注意……）。 [38325](https://github.com/flutter/flutter/pull/38325) refactor flutter upgrade to be 2 part, with the second part re-entrant [cd70b](https://github.com/dart-lang/sdk/commit/ec2d06d4b9f4f0accad2b4aa841499e8e93cd70b) Use MAP_JIT when doing an mmap for executable pages (needed for macOS Catalina). [38662](https://github.com/flutter/flutter/pull/38662) Change from using defaults to plutil for Plist parsing [2856](https://github.com/flutter/website/issues/2856) Update "Getting Started" path setup to support zsh shell (macOS Catalina support) [2857](https://github.com/flutter/website/issues/2857) Update "iOS Setup" page to reflect Xcode 11 UI update [37733](https://github.com/flutter/flutter/pull/37733) Support macOS Catalina-style signing certificate names [10010](https://github.com/flutter/engine/pull/10010) Use simarm_x64 when targeting arm [37407](https://github.com/flutter/flutter/pull/37407) Remove multi-arch check in iOS builds [37445](https://github.com/flutter/flutter/pull/37445) Switch iOS gen_snapshot from multi-arch binary to multiple binaries [37647](https://github.com/flutter/flutter/pull/37647) Change priority of gen_snapshot search paths ## iOS 本版本有超過 50 個 PR，iOS 支援持續是 Flutter 的重點，包括 iOS 13 捲軸實作（支援長按、從右側拖曳及震動回饋）、更新 CupertinoSwitch 元件以符合 iOS 13 規範，以及持續對 bitcode 的實驗性支援。 [35829](https://github.com/flutter/flutter/pull/35829) iOS 13 scrollbar [37724](https://github.com/flutter/flutter/pull/37724) iOS 13 scrollbar vibration [36087](https://github.com/flutter/flutter/pull/36087) Update visual style of CupertinoSwitch to match iOS 13 [38587](https://github.com/flutter/flutter/pull/38587) Improve bitcode check [36471](https://github.com/flutter/flutter/pull/36471) Enable bitcode compilation for AOT [36093](https://github.com/flutter/flutter/pull/36093) Reland bundle ios deps [34676](https://github.com/flutter/flutter/pull/34676) Enable selection by default for password text field and expose api to… [34723](https://github.com/flutter/flutter/pull/34723) CupertinoTextField vertical alignment [34964](https://github.com/flutter/flutter/pull/34964) CupertinoTextField.onTap [35303](https://github.com/flutter/flutter/pull/35303) fix default artifacts to exclude ios and android [35307](https://github.com/flutter/flutter/pull/35307) Clean up host_app_ephemeral Profile build settings [35731](https://github.com/flutter/flutter/pull/35731) Keep LLDB connection to iOS device alive while running from CLI. [35749](https://github.com/flutter/flutter/pull/35749) add iOS build benchmarks [35756](https://github.com/flutter/flutter/pull/35756) Remove @objc inference build setting [35763](https://github.com/flutter/flutter/pull/35763) UIApplicationLaunchOptionsKey -> UIApplication.LaunchOptionsKey [35833](https://github.com/flutter/flutter/pull/35833) Disable CocoaPods input and output paths in Xcode build phase for ephemeral add-to-app project [36174](https://github.com/flutter/flutter/pull/36174) [cupertino_icons] Add glyph refs for brightness #16102 [36194](https://github.com/flutter/flutter/pull/36194) Keep LLDB connection to iOS device alive while running from CLI. [36498](https://github.com/flutter/flutter/pull/36498) Clean up host_app_ephemeral_cocoapods Profile build settings [36793](https://github.com/flutter/flutter/pull/36793) Vend Flutter module App.framework as a local CocoaPod pod to be installed by a host app [36887](https://github.com/flutter/flutter/pull/36887) Fix thumb size calculation [37026](https://github.com/flutter/flutter/pull/37026) Add support for the Kannada (kn) locale [37048](https://github.com/flutter/flutter/pull/37048) use SizedBox instead of Container for building collapsed selection [37276](https://github.com/flutter/flutter/pull/37276) Make podhelper.rb a template to avoid passing in the module name [37319](https://github.com/flutter/flutter/pull/37319) resizeToAvoidBottomInset Cupertino without NavBar [37449](https://github.com/flutter/flutter/pull/37449) If xcode_backend.sh script fails or substitute variables are missing, fail the host Xcode build [37738](https://github.com/flutter/flutter/pull/37738) Use relative paths when installing module pods [37809](https://github.com/flutter/flutter/pull/37809) Add autofocus parameter to widgets which use Focus widget internally [37906](https://github.com/flutter/flutter/pull/37906) Always install the ephemeral engine copy instead of fetching from CocoaPods specs [38593](https://github.com/flutter/flutter/pull/38593) Fix text scale factor for non-content components of Cupertino scaffolds [38629](https://github.com/flutter/flutter/pull/38629) Handle case of a connected unpaired iOS device [38645](https://github.com/flutter/flutter/pull/38645) Rename iOS arch for macOS release mode (macOS release mode 2 of 3) [9075](https://github.com/flutter/engine/pull/9075) IOS Platform view transform/clipping [9464](https://github.com/flutter/engine/pull/9464) Added shebangs to ios unit test scripts. [9478](https://github.com/flutter/engine/pull/9478) iOS PlatformView clip path [9491](https://github.com/flutter/engine/pull/9491) Purge caches on low memory on iOS [9636](https://github.com/flutter/engine/pull/9636) Added shebangs to ios unit test scripts. (#9464) [9667](https://github.com/flutter/engine/pull/9667) iOS platform view opacity [9722](https://github.com/flutter/engine/pull/9722) Forwards iOS dark mode trait to the Flutter framework (#34441). [9819](https://github.com/flutter/engine/pull/9819) Allow for dynamic thread merging on IOS for embedded view mutations [9952](https://github.com/flutter/engine/pull/9952) ios: Fixed the callback for the first frame so that it isn't predicated on having a splash screen. [10186](https://github.com/flutter/engine/pull/10186) Ensure debug-mode apps are always attached on iOS. [10381](https://github.com/flutter/engine/pull/10381) Fix empty composing range on iOS [10386](https://github.com/flutter/engine/pull/10386) Don't use DBC for hot-reload on iOS. [10645](https://github.com/flutter/engine/pull/10645) Don't use DBC for hot-reload on iOS. [10656](https://github.com/flutter/engine/pull/10656) fix iOS keyboard crash : -[__NSCFString substringWithRange:], range o… [10662](https://github.com/flutter/engine/pull/10662) bump local podspec's ios deployment target version from 7.0 to 8.0 [10777](https://github.com/flutter/engine/pull/10777) Manually roll Skia to pull in iOS armv7 build failure fix. [10791](https://github.com/flutter/engine/pull/10791) Re-lands platform brightness support on iOS [10820](https://github.com/flutter/engine/pull/10820) iOS JIT support and enhancements for scenarios app [10949](https://github.com/flutter/engine/pull/10949) Fix iOS references to PostPrerollResult [11006](https://github.com/flutter/engine/pull/11006) On iOS report the preferred frames per second to tools via service protocol. ## Android 本版本 Android 最重要的新增功能，是支援新的 flutter 指令：`flutter build aar`。這個新的建置指令與 `flutter build apk` 或 `flutter build appbundle` 的運作方式相同，但適用於插件和模組專案。透過將插件建置為 [AAR](https://developer.android.com/studio/projects/android-library)，Android Gradle 插件可使用 Jetifier 將所有插件原生程式碼的支援函式庫轉換為 AndroidX 函式庫，從而降低在應用程式中使用 AndroidX 時的錯誤率。 [35217](https://github.com/flutter/flutter/pull/35217) Add flutter build aar [36732](https://github.com/flutter/flutter/pull/36732) Flutter build aar [10778](https://github.com/flutter/engine/pull/10778) Build JARs containing the Android embedding sources and the engine native library [34573](https://github.com/flutter/flutter/pull/34573) Ensures flutter jar is added to all build types on plugin projects [36695](https://github.com/flutter/flutter/pull/36695) Android visible password input type support [36805](https://github.com/flutter/flutter/pull/36805) Allow flavors and custom build types in host app [37194](https://github.com/flutter/flutter/pull/37194) [flutter_tool] More gracefully handle Android sdkmanager failure [37405](https://github.com/flutter/flutter/pull/37405) Add .android/Flutter/flutter.iml to module template. [37752](https://github.com/flutter/flutter/pull/37752) Remove dead flag gradle-dir in flutter config [9206](https://github.com/flutter/engine/pull/9206) Android Embedding Refactor PR31: Integrate platform views with the new embedding and the plugin shim. [9360](https://github.com/flutter/engine/pull/9360) Simplify loading of app bundles on Android [9476](https://github.com/flutter/engine/pull/9476) fix NPE when a touch event is sent to an unknown Android platform view [9501](https://github.com/flutter/engine/pull/9501) [android] External textures must be rescaled to fill the canvas [9525](https://github.com/flutter/engine/pull/9525) Android Embedding Refactor PR36: Add splash screen support. [9895](https://github.com/flutter/engine/pull/9895) Android Embedding PR37: Separated FlutterActivity and FlutterFragment via FlutterActivityAndFragmentDelegate [9999](https://github.com/flutter/engine/pull/9999) Add support for Android's visible password input type [10250](https://github.com/flutter/engine/pull/10250) Android Embedding Refactor 38: Removed AssetManager from DartEntrypoint. [10413](https://github.com/flutter/engine/pull/10413) Pass Android Q insets.systemGestureInsets to Window [10424](https://github.com/flutter/engine/pull/10424) Fix deprecation warnings in the Android embedding [10481](https://github.com/flutter/engine/pull/10481) Android embedding refactor pr40 add static engine cache [10771](https://github.com/flutter/engine/pull/10771) Don't use gradle daemon for building [11001](https://github.com/flutter/engine/pull/11001) Avoid dynamic lookups of the engine library's symbols on Android [11015](https://github.com/flutter/engine/pull/11015) Remove the output directory prefix from the Android engine JAR filename ## Material 當然，Material 設計語言也持續是 Flutter 的重點發展方向。 [34869](https://github.com/flutter/flutter/pull/34869) [Material] Properly call onChangeStart and onChangeEnd in Range Slider [34872](https://github.com/flutter/flutter/pull/34872) [Material] Support for hovered, focused, and pressed border color on OutlineButtons [34906](https://github.com/flutter/flutter/pull/34906) Fix unused [applicationIcon] property on [showLicensePage] [34932](https://github.com/flutter/flutter/pull/34932) Added onChanged property to TextFormField [35075](https://github.com/flutter/flutter/pull/35075) Allow for customizing SnackBar's content TextStyle in its theme [35282](https://github.com/flutter/flutter/pull/35282) Add Container fallback to Ink build method [35496](https://github.com/flutter/flutter/pull/35496) [Material] Text scale and wide label fixes for Slider and Range Slider value indicator shape [35499](https://github.com/flutter/flutter/pull/35499) Added MaterialApp.themeMode to control which theme is used. [35560](https://github.com/flutter/flutter/pull/35560) Support for elevation based dark theme overlay color in the Material widget [35878](https://github.com/flutter/flutter/pull/35878) Add flag to use root navigator for showModalBottomSheet [36028](https://github.com/flutter/flutter/pull/36028) Fix slider preferred height [36088](https://github.com/flutter/flutter/pull/36088) Add PopupMenuTheme to enable theming color, shape, elevation, text style of Menu [36409](https://github.com/flutter/flutter/pull/36409) Add searchFieldLabel to SearchDelegate in order to show a custom hint [36880](https://github.com/flutter/flutter/pull/36880) [Material] Create material Banner component [37038](https://github.com/flutter/flutter/pull/37038) Update SnackBar to the latest Material specs. [37259](https://github.com/flutter/flutter/pull/37259) [Material] Add support for hovered, pressed, focused, and selected text color on Chips. [37269](https://github.com/flutter/flutter/pull/37269) [Material] FAB refactor - remove unnecessary IconTheme [37355](https://github.com/flutter/flutter/pull/37355) Added ThemeData.from() method to construct a Theme from a ColorScheme [37403](https://github.com/flutter/flutter/pull/37403) add ontap to textformfield [37436](https://github.com/flutter/flutter/pull/37436) Hide text selection handle after entering text [37556](https://github.com/flutter/flutter/pull/37556) [Material] Make RawChip.selected non-nullable. [37636](https://github.com/flutter/flutter/pull/37636) Add CheckboxListTile checkColor [37715](https://github.com/flutter/flutter/pull/37715) Fix markdown link format [37825](https://github.com/flutter/flutter/pull/37825) Automatic focus highlight mode for FocusManager [37870](https://github.com/flutter/flutter/pull/37870) remove Header flag from BottomNavigationBar items [37877](https://github.com/flutter/flutter/pull/37877) Adds DefaultTextStyle ancestor to Tooltip Overlay [37882](https://github.com/flutter/flutter/pull/37882) Add dense property to AboutListTile [38467](https://github.com/flutter/flutter/pull/38467) [Material] Add splashColor to FAB and FAB ThemeData [38621](https://github.com/flutter/flutter/pull/38621) [Material] Create theme for Dividers to enable customization of thickness [38636](https://github.com/flutter/flutter/pull/38636) Adds the arrowColor option to UserAccountsDrawerHeader (#38608) ## 文字與無障礙 本版本文字與無障礙最重要的變更是全新的 ColorFilter 支援，可讓您為整個元件 (Widget) 樹重新上色，例如為有紅綠色盲的使用者調整應用程式的顯示效果。若想了解實際效果，請參閱此 [ColorFilter 範例](https://github.com/csells/flutter_color_filter)。 [35468](https://github.com/flutter/flutter/pull/35468) Add colorFilterLayer/Widget [9641](https://github.com/flutter/engine/pull/9641) Let pushColorFilter accept all types of ColorFilters [9668](https://github.com/flutter/engine/pull/9668) Refactor ColorFilter to have a native wrapper [9789](https://github.com/flutter/engine/pull/9789) fix ColorFilter.matrix constness [34515](https://github.com/flutter/flutter/pull/34515) OutlineInputBorder adjusts for borderRadius that is too large [35100](https://github.com/flutter/flutter/pull/35100) Add handling of 'TextInput.clearClient' message from platform to framework (#35054). [35219](https://github.com/flutter/flutter/pull/35219) Text selection menu show/hide cases [35493](https://github.com/flutter/flutter/pull/35493) Do not use ideographic baseline for RenderPargraph baseline [36974](https://github.com/flutter/flutter/pull/36974) Multiline Selection Menu Position Bug [37042](https://github.com/flutter/flutter/pull/37042) Fix selection menu not showing after clear [38573](https://github.com/flutter/flutter/pull/38573) Clamp scrollOffset to prevent textfield bouncing [35487](https://github.com/flutter/flutter/pull/35487) Fix RenderFittedBox when child.size.isEmpty [36243](https://github.com/flutter/flutter/pull/36243) Allow semantics labels to be shorter or longer than raw text [36303](https://github.com/flutter/flutter/pull/36303) Add sync star benchmark cases [37158](https://github.com/flutter/flutter/pull/37158) Fix Textfields in Semantics Debugger [37828](https://github.com/flutter/flutter/pull/37828) have android_semantics_testing use adb from ENV provided android sdk ## Web（技術預覽） 本版本持續推進 Flutter Web 平台支援的技術預覽，包括新增一個旗標以判斷應用程式是否在 Web 上執行。若想了解實際效果，請參閱 [flutter_mazegen 範例](https://github.com/csells/flutter_mazegen/)中的 [main.dart](https://github.com/csells/flutter_mazegen/blob/master/lib/main.dart)。如需進一步了解，請參閱 [Flutter for web](https://docs.flutter.dev/web)。 [36135](https://github.com/flutter/flutter/pull/36135) add a kIsWeb constant to foundation [34252](https://github.com/flutter/flutter/pull/34252) Integrate dwds into flutter tool for web support [34896](https://github.com/flutter/flutter/pull/34896) Allow multi-root web builds [35221](https://github.com/flutter/flutter/pull/35221) Twiggle bit to exclude dev and beta from desktop and web [36297](https://github.com/flutter/flutter/pull/36297) Add multi-line flag to semantics [36465](https://github.com/flutter/flutter/pull/36465) Use FlutterFeatures to configure web and desktop devices [36548](https://github.com/flutter/flutter/pull/36548) Fix the web builds by reverting version bump of build_modules [36549](https://github.com/flutter/flutter/pull/36549) fix number encoding in message codecs for the Web [37515](https://github.com/flutter/flutter/pull/37515) Upstream web support for IterableProperty [37637](https://github.com/flutter/flutter/pull/37637) don't call Platform.operatingSystem in RenderView diagnostics [37638](https://github.com/flutter/flutter/pull/37638) [web][upstream] Fix debugPrintStack for web platform [37658](https://github.com/flutter/flutter/pull/37658) fix windows path for dwds/web builds [37712](https://github.com/flutter/flutter/pull/37712) [web][upstream] Optimize InactiveElements deactivation [37812](https://github.com/flutter/flutter/pull/37812) [web][upstream] Don't register exit/saveCompilationTrace for web platform since they are not available [37815](https://github.com/flutter/flutter/pull/37815) Restructure resident web runner usage to avoid SDK users that don't support dwds [38499](https://github.com/flutter/flutter/pull/38499) Update build web compilers and configure libraries ## 桌面（實驗性） 我們持續推進 Flutter 桌面平台的實驗性支援。若您有意參與實驗，請參閱 [Flutter 桌面殼層](https://docs.flutter.dev/desktop)。 [32770](https://github.com/flutter/flutter/pull/32770) Dismiss modal with any button press [34660](https://github.com/flutter/flutter/pull/34660) Add --target support for Windows and Linux [34712](https://github.com/flutter/flutter/pull/34712) Fix FocusTraversalPolicy makes focus lost [34752](https://github.com/flutter/flutter/pull/34752) [linux] Receives the unmodified characters obtained from GLFW [35495](https://github.com/flutter/flutter/pull/35495) mark windows and macos chrome dev mode as flaky [36197](https://github.com/flutter/flutter/pull/36197) Fix windows, exclude widgets from others [36722](https://github.com/flutter/flutter/pull/36722) Skip flaky test windows [36784](https://github.com/flutter/flutter/pull/36784) [flutter_tool] Improve Windows flutter clean error message [36845](https://github.com/flutter/flutter/pull/36845) Improve Windows build failure message [36987](https://github.com/flutter/flutter/pull/36987) Flutter assemble for macos take 2! [37211](https://github.com/flutter/flutter/pull/37211) Don't enable scroll wheel when scrolling is off [37342](https://github.com/flutter/flutter/pull/37342) Fix mouse region crash when using closures [37344](https://github.com/flutter/flutter/pull/37344) Fix mouse region double render [37351](https://github.com/flutter/flutter/pull/37351) fix errors caught by roll of macOS assemble [37365](https://github.com/flutter/flutter/pull/37365) only build macOS kernel in debug mode [37425](https://github.com/flutter/flutter/pull/37425) Support for macOS release mode (1 of 3) [37509](https://github.com/flutter/flutter/pull/37509) Use macOS ephemeral directory for Pod env script [37664](https://github.com/flutter/flutter/pull/37664) Partial macOS assemble revert [37891](https://github.com/flutter/flutter/pull/37891) Focus debug [38651](https://github.com/flutter/flutter/pull/38651) Update the macOS Podfile template platform version [9654](https://github.com/flutter/engine/pull/9654) Begin separating macOS engine from view controller [9672](https://github.com/flutter/engine/pull/9672) Add FLEDartProject for macOS embedding [9745](https://github.com/flutter/engine/pull/9745) Fix windows test by not attempting to open a directory as a file. [9799](https://github.com/flutter/engine/pull/9799) Update buildroot to c4df4a7b to pull in MSVC 2017 Update 9 on Windows. [9835](https://github.com/flutter/engine/pull/9835) [Windows] Alternative Windows shell platform implementation [9953](https://github.com/flutter/engine/pull/9953) [macos] Add reply to binary messenger [10009](https://github.com/flutter/engine/pull/10009) [macos] Revert check on FlutterCodecs and refactor message function] [10189](https://github.com/flutter/engine/pull/10189) [macos] Reland function refactor [11010](https://github.com/flutter/engine/pull/11010) Rename macOS FLE* classes to Flutter* [36546](https://github.com/flutter/flutter/pull/36546) Unskip date_picker_test on Windows as underlying issue 19696 was fixed. ## 框架 Flutter 核心框架在本版本中新增了數項重要功能，包括額外支援 24 種新語系（[從南非荷蘭語到祖魯語](https://github.com/flutter/flutter/pull/36589)）。 [36589](https://github.com/flutter/flutter/pull/36589) Update Localizations: added 24 new locales (reprise) [33936](https://github.com/flutter/flutter/pull/33936) New parameter for RawGestureDetector to customize semantics mapping [34202](https://github.com/flutter/flutter/pull/34202) Remove _debugWillReattachChildren assertions from _TableElement [34626](https://github.com/flutter/flutter/pull/34626) AsyncSnapshot.data to throw if error or no data [34895](https://github.com/flutter/flutter/pull/34895) Remove flutter_tools support for old AOT snapshotting [34919](https://github.com/flutter/flutter/pull/34919) Remove duplicate error parts [35132](https://github.com/flutter/flutter/pull/35132) Reduce allocations by reusing a matrix for transient transforms in _transformRect [35143](https://github.com/flutter/flutter/pull/35143) More HttpClientResponse Uint8List fixes [35149](https://github.com/flutter/flutter/pull/35149) More HttpClientResponse implements Stream fixes [35232](https://github.com/flutter/flutter/pull/35232) New benchmark: Gesture semantics [35233](https://github.com/flutter/flutter/pull/35233) Attempt skipping coverage shard if tools did not change [35245](https://github.com/flutter/flutter/pull/35245) More preparation for HttpClientResponse implements Uint8List [35246](https://github.com/flutter/flutter/pull/35246) attempt to not skip coverage on post commit [35263](https://github.com/flutter/flutter/pull/35263) remove unnecessary ..toList() [35280](https://github.com/flutter/flutter/pull/35280) benchmarkWidgets.semanticsEnabled default false. [35288](https://github.com/flutter/flutter/pull/35288) Apply coverage skip math correctly [35408](https://github.com/flutter/flutter/pull/35408) Remove print [35482](https://github.com/flutter/flutter/pull/35482) Use the new service protocol message names [35491](https://github.com/flutter/flutter/pull/35491) Include tags in SemanticsNode debug properties [35646](https://github.com/flutter/flutter/pull/35646) Prepare for Socket implements Stream [35725](https://github.com/flutter/flutter/pull/35725) Update annotated region findAll implementation to use Iterables directly. [35750](https://github.com/flutter/flutter/pull/35750) use sentence case in error message titles [35762](https://github.com/flutter/flutter/pull/35762) Refactor keymapping for resident_runner [35828](https://github.com/flutter/flutter/pull/35828) Cleanup widgets/sliver_persistent_header.dart with resolution of dart-lang/sdk#31543 [35913](https://github.com/flutter/flutter/pull/35913) Change focus example to be more canonical (and correct) [35932](https://github.com/flutter/flutter/pull/35932) Upgraded framework packages with 'flutter update-packages --force-upgrade'. [35979](https://github.com/flutter/flutter/pull/35979) Optimizes gesture recognizer fixes #35658 [36262](https://github.com/flutter/flutter/pull/36262) Prevents infinite loop in Table._computeColumnWidths [36302](https://github.com/flutter/flutter/pull/36302) Issues/30526 gc [36333](https://github.com/flutter/flutter/pull/36333) fix sliver fixed pinned appbar [36396](https://github.com/flutter/flutter/pull/36396) Optimize the transformRect and transformPoint methods in matrix_utils. [36482](https://github.com/flutter/flutter/pull/36482) Sped up shader warmup by only drawing on a 100x100 surface [36493](https://github.com/flutter/flutter/pull/36493) Fixes sliver list does not layout firstchild when child reordered [36503](https://github.com/flutter/flutter/pull/36503) Disabling Firebase Test Lab smoke test to unblock autoroller [36698](https://github.com/flutter/flutter/pull/36698) fixes iphone force press keyboard select crashes [36768](https://github.com/flutter/flutter/pull/36768) add an error count field to the Flutter.Error event [36857](https://github.com/flutter/flutter/pull/36857) Ensure user-thrown errors have ErrorSummary nodes [36867](https://github.com/flutter/flutter/pull/36867) Add reference to StrutStyle from TextStyle [36955](https://github.com/flutter/flutter/pull/36955) Extract common PlatformView functionality: Painting and Semantics [37187](https://github.com/flutter/flutter/pull/37187) use FlutterError in MultiChildRenderObjectWidget [37275](https://github.com/flutter/flutter/pull/37275) Optimize the transformRect and transformPoint methods in matrix_utils… [37479](https://github.com/flutter/flutter/pull/37479) Remove bogus code in ContainerParentDataMixin.detach [37497](https://github.com/flutter/flutter/pull/37497) Extract common PlatformView functionality: Gesture and PointerEvent [37703](https://github.com/flutter/flutter/pull/37703) PlatformViewLink, handling creation of the PlatformViewSurface and dispose PlatformViewController [37790](https://github.com/flutter/flutter/pull/37790) Doc: Image.memory only accepts compressed format [37880](https://github.com/flutter/flutter/pull/37880) reduce mac workload [38441](https://github.com/flutter/flutter/pull/38441) Fix getOffsetToReveal for growthDirection reversed and AxisDirection down or right [38463](https://github.com/flutter/flutter/pull/38463) Do not construct arguments to _focusDebug when running in non-debug modes [38639](https://github.com/flutter/flutter/pull/38639) PlatformViewLink. cached surface should be a Widget type [38686](https://github.com/flutter/flutter/pull/38686) Rename patent file [38704](https://github.com/flutter/flutter/pull/38704) Adds canRequestFocus toggle to FocusNode [38710](https://github.com/flutter/flutter/pull/38710) PlatformViewLink: Rename CreatePlatformViewController to CreatePlatformViewCallback [35335](https://github.com/flutter/flutter/pull/35335) Using custom exception class for network loading error [35574](https://github.com/flutter/flutter/pull/35574) Fix semantics for floating pinned sliver app bar [35810](https://github.com/flutter/flutter/pull/35810) SliverFillRemaining accounts for child size when hasScrollBody is false [35941](https://github.com/flutter/flutter/pull/35941) SliverLayoutBuilder ## 引擎 核心引擎在本版本中持續於各方面獲得大量改進。 [9041](https://github.com/flutter/engine/pull/9041) TextStyle.height property as a multiple of font size instead of multiple of ascent+descent+leading. [9089](https://github.com/flutter/engine/pull/9089) Wire up custom event loop interop for the GLFW embedder. [9329](https://github.com/flutter/engine/pull/9329) Fixed memory leak by way of accidental retain on implicit self [9403](https://github.com/flutter/engine/pull/9403) Remove variants of ParagraphBuilder::AddText that are not used within the engine [9419](https://github.com/flutter/engine/pull/9419) Has a binary messenger [9423](https://github.com/flutter/engine/pull/9423) Don't hang to a platform view's input connection after it's disposed [9424](https://github.com/flutter/engine/pull/9424) Send timings of the first frame without batching [9431](https://github.com/flutter/engine/pull/9431) Generate weak pointers only in the platform thread [9436](https://github.com/flutter/engine/pull/9436) Add the functionality to merge and unmerge MessageLoopTaskQueues [9439](https://github.com/flutter/engine/pull/9439) Eliminate unused import in FlutterView [9452](https://github.com/flutter/engine/pull/9452) Convert RRect.scaleRadii to public method [9456](https://github.com/flutter/engine/pull/9456) Made sure that the run_tests script returns the right error code. [9459](https://github.com/flutter/engine/pull/9459) Remove unused/unimplemented shell constructor [9460](https://github.com/flutter/engine/pull/9460) Fixed logLevel filter bug so that filter now works as expected. [9461](https://github.com/flutter/engine/pull/9461) Adds API for retaining intermediate engine layers [9463](https://github.com/flutter/engine/pull/9463) Removed unused imports in new embedding. [9466](https://github.com/flutter/engine/pull/9466) Re-enable the Wuffs GIF decoder [9468](https://github.com/flutter/engine/pull/9468) Manually draw remainder curve for wavy decorations [9485](https://github.com/flutter/engine/pull/9485) Add --observatory-host switch [9486](https://github.com/flutter/engine/pull/9486) Rework image & texture management to use concurrent message queues. [9489](https://github.com/flutter/engine/pull/9489) Handle ambiguous directionality of final trailing whitespace in mixed bidi text [9490](https://github.com/flutter/engine/pull/9490) fix a bug where the platform view's transform is not reset before set frame [9493](https://github.com/flutter/engine/pull/9493) Run benchmarks on try jobs. [9495](https://github.com/flutter/engine/pull/9495) fix build breakage on [PlatformViews.mm](http://platformviews.mm/) [9498](https://github.com/flutter/engine/pull/9498) Notify framework to clear input connection when app is backgrounded (#35054). [9503](https://github.com/flutter/engine/pull/9503) Improve caching limits for Skia [9506](https://github.com/flutter/engine/pull/9506) Synchronize main thread and gpu thread for first render frame [9508](https://github.com/flutter/engine/pull/9508) Support image filter on paint [9532](https://github.com/flutter/engine/pull/9532) fix FlutterOverlayView doesn't remove from superview in some cases [9556](https://github.com/flutter/engine/pull/9556) Minimal integration with the Skia text shaper module [9561](https://github.com/flutter/engine/pull/9561) libtxt: fix reference counting of SkFontStyleSets held by font asset providers [9585](https://github.com/flutter/engine/pull/9585) Fix a race in the embedder accessibility unit test [9589](https://github.com/flutter/engine/pull/9589) Fixes a plugin overwrite bug in the plugin shim system. [9590](https://github.com/flutter/engine/pull/9590) Apply patches that have landed in topaz since we ported the runners to the engine repo [9591](https://github.com/flutter/engine/pull/9591) Document various classes in //flutter/shell/common. [9632](https://github.com/flutter/engine/pull/9632) Added Doxyfile. [9633](https://github.com/flutter/engine/pull/9633) Cherry-pick fix for flutter/flutter#35291 [9640](https://github.com/flutter/engine/pull/9640) make EmbeddedViewParams a unique ptr [9642](https://github.com/flutter/engine/pull/9642) Fix warning about settings unavailable GN arg build_glfw_shell [9651](https://github.com/flutter/engine/pull/9651) Move the mutators stack handling to preroll [9652](https://github.com/flutter/engine/pull/9652) Pipeline allows continuations that can produce to front [9653](https://github.com/flutter/engine/pull/9653) External view embedder can tell if embedded views have mutated [9655](https://github.com/flutter/engine/pull/9655) Allow embedders to add callbacks for responses to platform messages from the framework. [9660](https://github.com/flutter/engine/pull/9660) ExternalViewEmbedder can CancelFrame after pre-roll [9661](https://github.com/flutter/engine/pull/9661) Raster now returns an enum rather than boolean [9663](https://github.com/flutter/engine/pull/9663) Mutators Stack refactoring [9685](https://github.com/flutter/engine/pull/9685) fix Picture.toImage return type check and api conform test. [9698](https://github.com/flutter/engine/pull/9698) Ensure that platform messages without response handles can be dispatched. [9713](https://github.com/flutter/engine/pull/9713) Explain why OpacityLayer has an offset field [9717](https://github.com/flutter/engine/pull/9717) Fixed logLevel filter bug so that filter now works as expected. (#9460) [9721](https://github.com/flutter/engine/pull/9721) Add comments to differentiate two cache paths [9725](https://github.com/flutter/engine/pull/9725) Make the license script compatible with recently changed Dart I/O stream APIs [9727](https://github.com/flutter/engine/pull/9727) Add hooks for InputConnection lock and unlocking [9734](https://github.com/flutter/engine/pull/9734) Fix backspace crash on Chinese devices [9737](https://github.com/flutter/engine/pull/9737) Use libc++ variant of string view and remove the FML variant. [9741](https://github.com/flutter/engine/pull/9741) Make FLEViewController's view an internal detail [9747](https://github.com/flutter/engine/pull/9747) Remove get engine [9750](https://github.com/flutter/engine/pull/9750) FLEViewController/Engine API changes [9758](https://github.com/flutter/engine/pull/9758) Include SkParagraph headers only when the enable-skshaper flag is on [9762](https://github.com/flutter/engine/pull/9762) Fall back to a fully qualified path to [libapp.so](http://libapp.so/) if the library can not be loaded by name [9767](https://github.com/flutter/engine/pull/9767) Un-deprecated FlutterViewController's binaryMessenger. [9769](https://github.com/flutter/engine/pull/9769) Document //flutter/shell/common/engine. [9772](https://github.com/flutter/engine/pull/9772) fix objcdoc generation [9781](https://github.com/flutter/engine/pull/9781) SendPlatformMessage allow null message value [9797](https://github.com/flutter/engine/pull/9797) Remove breaking asserts [9808](https://github.com/flutter/engine/pull/9808) Document FontFeature class [9809](https://github.com/flutter/engine/pull/9809) Document //flutter/shell/common/rasterizer [9813](https://github.com/flutter/engine/pull/9813) Made Picture::toImage happen on the IO thread with no need for an onscreen surface. [9815](https://github.com/flutter/engine/pull/9815) Made the persistent cache's directory a const pointer. [9816](https://github.com/flutter/engine/pull/9816) Only release the image data in the unit-test once Skia has accepted ownership of it. [9825](https://github.com/flutter/engine/pull/9825) In a single frame codec, release the encoded image buffer after giving it to the decoder [9828](https://github.com/flutter/engine/pull/9828) Make the virtual display's window translucent [9847](https://github.com/flutter/engine/pull/9847) Started adding the engine hash to frameworks' Info.plist. [9849](https://github.com/flutter/engine/pull/9849) Preserve the alpha for VD content by setting a transparent background. [9850](https://github.com/flutter/engine/pull/9850) Add multi-line flag to semantics [9851](https://github.com/flutter/engine/pull/9851) Add a macro for prefixing embedder.h symbols [9855](https://github.com/flutter/engine/pull/9855) Fix missing assignment to _allowHeadlessExecution [9859](https://github.com/flutter/engine/pull/9859) Fix justify for RTL paragraphs. [9867](https://github.com/flutter/engine/pull/9867) Fixed error in generated xml Info.plist. [9873](https://github.com/flutter/engine/pull/9873) Add clang version to Info.plist [9875](https://github.com/flutter/engine/pull/9875) Simplify buildtools [9890](https://github.com/flutter/engine/pull/9890) Log dlopen errors only in debug mode [9893](https://github.com/flutter/engine/pull/9893) Removed logic from FlutterAppDelegate into FlutterPluginAppLifeCycleDelegate [9894](https://github.com/flutter/engine/pull/9894) Add the isMultiline semantics flag to values [9896](https://github.com/flutter/engine/pull/9896) Capture stderr for ninja command [9901](https://github.com/flutter/engine/pull/9901) Handle decompressed images in InstantiateImageCodec [9905](https://github.com/flutter/engine/pull/9905) Respect EXIF information while decompressing images. [9906](https://github.com/flutter/engine/pull/9906) Update libcxx & libcxxabi to HEAD in prep for compiler upgrade. [9919](https://github.com/flutter/engine/pull/9919) Removed unused method. [9920](https://github.com/flutter/engine/pull/9920) Fix caching of Locale.toString [9922](https://github.com/flutter/engine/pull/9922) Split out lifecycle protocol [9923](https://github.com/flutter/engine/pull/9923) Fix failure of the onReportTimings window hook test [9924](https://github.com/flutter/engine/pull/9924) Don't try to use unset assets_dir setting [9925](https://github.com/flutter/engine/pull/9925) Fix the geometry test to reflect that OffsetBase comparison operators are a partial ordering [9927](https://github.com/flutter/engine/pull/9927) Update Buildroot Version [9929](https://github.com/flutter/engine/pull/9929) Update the exception thrown for invalid data in the codec test [9931](https://github.com/flutter/engine/pull/9931) Fix reentrancy handling in SingleFrameCodec [9932](https://github.com/flutter/engine/pull/9932) Exit flutter_tester with an error code on an unhandled exception [9934](https://github.com/flutter/engine/pull/9934) Updates to the engine test runner script [9935](https://github.com/flutter/engine/pull/9935) Fix backspace crash on Chinese devices (#9734) [9936](https://github.com/flutter/engine/pull/9936) Move development.key from buildroot [9937](https://github.com/flutter/engine/pull/9937) [platform view] do not make clipping view and interceptor view clipToBounds [9938](https://github.com/flutter/engine/pull/9938) Removed PlatformViewsController if-statements from TextInputPlugin (#34286). [9939](https://github.com/flutter/engine/pull/9939) Added hasRenderedFirstFrame() to old FlutterView for Espresso (#36211). [9948](https://github.com/flutter/engine/pull/9948) [glfw] Enables replies on binary messenger in glfw embedder [9958](https://github.com/flutter/engine/pull/9958) Clean up cirrus.yml file a little [9961](https://github.com/flutter/engine/pull/9961) Fix return type of assert function in gradient_test [9977](https://github.com/flutter/engine/pull/9977) Fix flutter/flutter #34791 [9987](https://github.com/flutter/engine/pull/9987) Update GN to git_revision:152c5144ceed9592c20f0c8fd55769646077569b [10012](https://github.com/flutter/engine/pull/10012) Undelete used method [10021](https://github.com/flutter/engine/pull/10021) Added a DartExecutor API for querying ## of pending channel callbacks [10056](https://github.com/flutter/engine/pull/10056) Update .cirrus.yml [10063](https://github.com/flutter/engine/pull/10063) Track clusters and return cluster boundaries in getGlyphPositionForCoordinates (emoji fix) [10064](https://github.com/flutter/engine/pull/10064) Disable DartLifecycleTest::ShuttingDownTheVMShutsDownAllIsolates in runtime_unittests. [10068](https://github.com/flutter/engine/pull/10068) Fixed memory leak with engine registrars. [10069](https://github.com/flutter/engine/pull/10069) Enable consts from environment in DDK for flutter_web [10073](https://github.com/flutter/engine/pull/10073) Basic structure for flutter_jit_runner far [10074](https://github.com/flutter/engine/pull/10074) Change ParagraphBuilder to replace the parent style's font families with the child style's font families [10075](https://github.com/flutter/engine/pull/10075) Change flutter runner target for LUCI [10078](https://github.com/flutter/engine/pull/10078) One more luci fix [10109](https://github.com/flutter/engine/pull/10109) Cache font family lookups that fail to obtain a font collection [10127](https://github.com/flutter/engine/pull/10127) Track detailed LibTxt metrics [10128](https://github.com/flutter/engine/pull/10128) Started linking the test targets against Flutter. [10151](https://github.com/flutter/engine/pull/10151) [fucshia] fix name to reflect the cmx file [10155](https://github.com/flutter/engine/pull/10155) src/third_party/dart a2aec5eb06...86dba81dec [10172](https://github.com/flutter/engine/pull/10172) [dart_runner] Rename dart to dart runner [10176](https://github.com/flutter/engine/pull/10176) Add suggested Java changes from flutter roll [10178](https://github.com/flutter/engine/pull/10178) Removed unnecessary call to find the App.framework. [10179](https://github.com/flutter/engine/pull/10179) [dart_runner] dart jit runner and dart jit product runner [10195](https://github.com/flutter/engine/pull/10195) Allow embedder controlled composition of Flutter layers. [10235](https://github.com/flutter/engine/pull/10235) Deprecate FlutterView#enableTransparentBackground [10242](https://github.com/flutter/engine/pull/10242) Remove Dead Scenic Clipping Code Path. [10265](https://github.com/flutter/engine/pull/10265) [dart-roll] Roll dart sdk to 80c4954d4d1d2a257005793d83b601f3ff2997a2 [10273](https://github.com/flutter/engine/pull/10273) Remove one last final call to AddPart() [10282](https://github.com/flutter/engine/pull/10282) Export FFI from sky_engine. [10295](https://github.com/flutter/engine/pull/10295) Fix memory overrun in minikin patch [10296](https://github.com/flutter/engine/pull/10296) fix CI [10297](https://github.com/flutter/engine/pull/10297) Ensure that the SingleFrameCodec stays alive until the ImageDecoder invokes its callback [10298](https://github.com/flutter/engine/pull/10298) Fix red build again [10303](https://github.com/flutter/engine/pull/10303) Make tree green for real this time, I promise. [10414](https://github.com/flutter/engine/pull/10414) expose max depth on Window [10419](https://github.com/flutter/engine/pull/10419) Make kernel compiler use host toolchain [10423](https://github.com/flutter/engine/pull/10423) Fix mac gen_snapshot uploader [10430](https://github.com/flutter/engine/pull/10430) Add copy_gen_snapshots.py tool [10477](https://github.com/flutter/engine/pull/10477) Add #else, #endif condition comments [10479](https://github.com/flutter/engine/pull/10479) Delete unused create_macos_gen_snapshot.py script [10485](https://github.com/flutter/engine/pull/10485) Remove semi-redundant try-jobs. [10629](https://github.com/flutter/engine/pull/10629) Fix engine platformviewscontroller leak [10637](https://github.com/flutter/engine/pull/10637) Document the thread test fixture. [10644](https://github.com/flutter/engine/pull/10644) [flutter_runner] Port: Add connectToService, wrapping fdio_ns_connect. [10652](https://github.com/flutter/engine/pull/10652) Allow embedders to control Dart VM lifecycle on engine shutdown. [10674](https://github.com/flutter/engine/pull/10674) When setting up AOT snapshots from symbol references, make buffer sizes optional. [10675](https://github.com/flutter/engine/pull/10675) Improvements to the flutter GDB script [10773](https://github.com/flutter/engine/pull/10773) Remove use of the deprecated AccessibilityNodeInfo boundsInParent API [10776](https://github.com/flutter/engine/pull/10776) rename stub_ui to web_ui [10780](https://github.com/flutter/engine/pull/10780) [flutter_runner] Improve frame scheduling [10781](https://github.com/flutter/engine/pull/10781) [flutter] Create the compositor context on the GPU task runner. [10782](https://github.com/flutter/engine/pull/10782) Update license script to handle ANGLE [10783](https://github.com/flutter/engine/pull/10783) Make firebase test more LUCI friendly [10786](https://github.com/flutter/engine/pull/10786) Remove 3 semi-redundant try-jobs [10787](https://github.com/flutter/engine/pull/10787) Change call to |AddPart| to |AddChild| [10788](https://github.com/flutter/engine/pull/10788) Wire up a concurrent message loop backed SkExecutor for Skia. [10797](https://github.com/flutter/engine/pull/10797) Rename artifacts so they match the Maven convention [10799](https://github.com/flutter/engine/pull/10799) Add a test for creating images from bytes. [10808](https://github.com/flutter/engine/pull/10808) Remove flutter_kernel_sdk dart script [10809](https://github.com/flutter/engine/pull/10809) [dart:zircon] Porting Cache re-usable handle wait objects [10815](https://github.com/flutter/engine/pull/10815) Return an empty mapping for an empty file asset [10816](https://github.com/flutter/engine/pull/10816) Add firstFrameDidRender to FlutterViewController [10823](https://github.com/flutter/engine/pull/10823) Expose isolateId for engine [10941](https://github.com/flutter/engine/pull/10941) Report test failures in run_tests.py [10952](https://github.com/flutter/engine/pull/10952) Change SemanticsNode#children lists to be non-null [10955](https://github.com/flutter/engine/pull/10955) Fix format [10956](https://github.com/flutter/engine/pull/10956) Increase the license block scan from 5k to 6k [11002](https://github.com/flutter/engine/pull/11002) Remove a tracing macro with a dangling pointer [11004](https://github.com/flutter/engine/pull/11004) Trace RasterCacheResult::Draw [11005](https://github.com/flutter/engine/pull/11005) Drop firebase test from Cirrus [11007](https://github.com/flutter/engine/pull/11007) Update [README.md](http://readme.md/) [11011](https://github.com/flutter/engine/pull/11011) Initialize the engine in the running state to match the animator's default state [11012](https://github.com/flutter/engine/pull/11012) Remove the ParagraphImpl class from the text API [11013](https://github.com/flutter/engine/pull/11013) Remove ability to override mac_sdk_path in flutter/tools/gn [11024](https://github.com/flutter/engine/pull/11024) Add _glfw versions of the GLFW desktop libraries [11027](https://github.com/flutter/engine/pull/11027) Fix first frame logic [11029](https://github.com/flutter/engine/pull/11029) Disable a deprecation warning for use of a TaskDescription constructor for older platforms [11033](https://github.com/flutter/engine/pull/11033) remove OS version [11034](https://github.com/flutter/engine/pull/11034) Show all license diffs [11038](https://github.com/flutter/engine/pull/11038) Make JIT work on iPhone armv7 [11040](https://github.com/flutter/engine/pull/11040) Hide verbose dart snapshot during run_test.py [11041](https://github.com/flutter/engine/pull/11041) Add a BroadcastStream to FrameTiming [11046](https://github.com/flutter/engine/pull/11046) Add ccls config files to .gitignore [11052](https://github.com/flutter/engine/pull/11052) Remove unused dstColorSpace argument to MakeCrossContextFromPixmap [11056](https://github.com/flutter/engine/pull/11056) Sort the Skia typefaces in a font style set into a consistent order [11062](https://github.com/flutter/engine/pull/11062) Provide a placeholder queue ID for the custom embedder task runner. [11067](https://github.com/flutter/engine/pull/11067) Minor update to the Robolectric test harness [11068](https://github.com/flutter/engine/pull/11068) More updates to the Robolectric test harness [11075](https://github.com/flutter/engine/pull/11075) [dynamic_thread_merging] Resubmit only on the frame where the merge ## 工具 一如既往，Flutter 的端對端體驗高度依賴其工具鏈。有鑑於此，除了下方聚焦於 flutter CLI 工具的 PR 之外，您也應該查閱以下 IntelliJ/Android Studio Flutter 插件、VSCode Flutter 插件及 Dart DevTools 的發行版： * [DevTools 0.1.6 Release Notes](https://groups.google.com/forum/#!topic/flutter-announce/x9eiBq-OZUk) - Sept 5, 2019 * [IntelliJ Plugin M39 Release Notes](https://groups.google.com/forum/?utm_medium=email&utm_source=footer#!msg/flutter-announce/HH2-z-wYMH4/Yb1mzIPWBgAJ) - Sept 3, 2019 * [VSCode Plugin v3.4](https://dartcode.org/releases/v3-4/) - Sept 3, 2019 * [DevTools 0.1.5 Release Notes](https://groups.google.com/forum/#!searchin/flutter-announce/release$20notes|sort:date/flutter-announce/_tBeov94GEk/8IMoZnV0DQAJ) - Aug 5, 2019 * [VSCode Plugin v3.3](https://dartcode.org/releases/v3-3/) - Aug 2, 2019 * [IntelliJ Plugin M38 Release Notes](https://groups.google.com/forum/#!searchin/flutter-announce/intellij|sort:date/flutter-announce/-LQPz3C3JAM/ZR2WnOklEQAJ) - Aug 2, 2019 * [DevTools 0.1.4 Release Notes](https://groups.google.com/forum/#!searchin/flutter-announce/release$20notes|sort:date/flutter-announce/ZUcqjzEDTKc/ABZtXXOpCgAJ) - Jul 19, 2019 * [VSCode Plugin v3.2](https://dartcode.org/releases/v3-2/) - Jun 28, 2019 In addition, this release also has a lot going on under the hood to provide you with better, more actionable error messages. You can read about those details in [this blog post](https://blog.flutter.dev/improving-flutters-error-messages-e098513cecf9) from the Flutter User Experience team. [32511](https://github.com/flutter/flutter/pull/32511) Rendering errors with root causes in the widget layer should have a reference to the widget [28090](https://github.com/flutter/flutter/pull/28090) Ensure that cache dirs and files have appropriate permissions [32816](https://github.com/flutter/flutter/pull/32816) Add initial implementation of flutter assemble [34624](https://github.com/flutter/flutter/pull/34624) Break down flutter doctor validations and results [34785](https://github.com/flutter/flutter/pull/34785) Tweak the display name of emulators [34794](https://github.com/flutter/flutter/pull/34794) Add emulatorID field to devices in daemon [35084](https://github.com/flutter/flutter/pull/35084) Move findTargetDevices to DeviceManager [35092](https://github.com/flutter/flutter/pull/35092) Add FlutterProjectFactory so that it can be overridden internally. [35186](https://github.com/flutter/flutter/pull/35186) Make tool coverage collection resilient to sentinel coverage data [35188](https://github.com/flutter/flutter/pull/35188) ensure test isolate is paused before collecting coverage [35192](https://github.com/flutter/flutter/pull/35192) don't block any presubmit on coverage [35231](https://github.com/flutter/flutter/pull/35231) Fix coverage collection [35367](https://github.com/flutter/flutter/pull/35367) Add type to StreamChannel in generated test code. [35392](https://github.com/flutter/flutter/pull/35392) Add timer checking and Fake http client to testbed [35406](https://github.com/flutter/flutter/pull/35406) Refactor signal and command line handler from resident runner [35465](https://github.com/flutter/flutter/pull/35465) Mark update-packages as non-experimental [35467](https://github.com/flutter/flutter/pull/35467) Mark update-packages as non-experimental [35480](https://github.com/flutter/flutter/pull/35480) Update the help message on precache command for less confusion [35681](https://github.com/flutter/flutter/pull/35681) Disable incremental compiler in dartdevc [35765](https://github.com/flutter/flutter/pull/35765) Use public _registerService RPC in flutter_tools [35767](https://github.com/flutter/flutter/pull/35767) set targets of zero percent for tools codecoverage [35839](https://github.com/flutter/flutter/pull/35839) use pub run for create test and remove [INFO] logs [35846](https://github.com/flutter/flutter/pull/35846) move reload and restart handling into terminal [36017](https://github.com/flutter/flutter/pull/36017) Move reporting files to reporting/ [36082](https://github.com/flutter/flutter/pull/36082) Add better handling of JSON-RPC exception [36084](https://github.com/flutter/flutter/pull/36084) handle google3 version of pb [36105](https://github.com/flutter/flutter/pull/36105) [flutter_tool] Catch a yaml parse failure during project creation [36109](https://github.com/flutter/flutter/pull/36109) Catch exceptions thrown by runChecked* when possible [36122](https://github.com/flutter/flutter/pull/36122) Make sure add-to-app build bundle from outer xcodebuild/gradlew sends analytics [36138](https://github.com/flutter/flutter/pull/36138) Implement feature flag system for flutter tools [36199](https://github.com/flutter/flutter/pull/36199) Don't try to flutterExit if isolate is still paused [36208](https://github.com/flutter/flutter/pull/36208) [flutter_tool] Allow analytics without a terminal attached [36213](https://github.com/flutter/flutter/pull/36213) Use DeviceManager instead of device to determine if device supports project. [36218](https://github.com/flutter/flutter/pull/36218) release lock in flutter pub context [36237](https://github.com/flutter/flutter/pull/36237) Recommend to use the final version of CDN support for the trunk specs repo. [36240](https://github.com/flutter/flutter/pull/36240) Rearrange flutter assemble implementation [36288](https://github.com/flutter/flutter/pull/36288) Throw exception if instantiating IOSDevice on non-mac os platform [36289](https://github.com/flutter/flutter/pull/36289) FakeHttpClientResponse improvements [36318](https://github.com/flutter/flutter/pull/36318) Include flutter_runner in precache artifacts. [36327](https://github.com/flutter/flutter/pull/36327) Fix invocations of ideviceinstaller not passing DYLD_LIBRARY_PATH [36331](https://github.com/flutter/flutter/pull/36331) Minor fixes to precache help text (attempt #2) [36434](https://github.com/flutter/flutter/pull/36434) Clean up flutter driver device detection. [36481](https://github.com/flutter/flutter/pull/36481) Remove untested code [36490](https://github.com/flutter/flutter/pull/36490) [flutter_tool] Send analytics command before the command runs [36507](https://github.com/flutter/flutter/pull/36507) Bump engine version [36513](https://github.com/flutter/flutter/pull/36513) Fix flutter pub -v [36556](https://github.com/flutter/flutter/pull/36556) Fix usage test to use local usage [36560](https://github.com/flutter/flutter/pull/36560) [flutter_tools] Add some useful commands to the [README.md](http://readme.md/) [36564](https://github.com/flutter/flutter/pull/36564) Make sure fx flutter attach can find devices [36569](https://github.com/flutter/flutter/pull/36569) Some minor cleanup for flutter_tools [36570](https://github.com/flutter/flutter/pull/36570) Some minor fixes to the tool_coverage tool [36585](https://github.com/flutter/flutter/pull/36585) Place build outputs under dart tool [36598](https://github.com/flutter/flutter/pull/36598) Expose functionality to compile dart to kernel for the VM [36679](https://github.com/flutter/flutter/pull/36679) add line-length to flutter format command line [36727](https://github.com/flutter/flutter/pull/36727) Add missing config to create [36773](https://github.com/flutter/flutter/pull/36773) Expose build-dir config option [36774](https://github.com/flutter/flutter/pull/36774) Parameterize CoverageCollector with a library name predicate [36785](https://github.com/flutter/flutter/pull/36785) [flutter_tool] Clean up usage events and custom dimensions [36787](https://github.com/flutter/flutter/pull/36787) Check for directory instead of path separator [36832](https://github.com/flutter/flutter/pull/36832) Remove flaky check for analyzer message. [37036](https://github.com/flutter/flutter/pull/37036) Build number (part after +) is documented as optional, use entire app version if not present [37044](https://github.com/flutter/flutter/pull/37044) [flutter_tool] Make a couple file operations synchronous [37186](https://github.com/flutter/flutter/pull/37186) [flutter_tool] Usage refactor cleanup [37196](https://github.com/flutter/flutter/pull/37196) [flutter_tool] Catch ProcessException from 'adb devices' [37198](https://github.com/flutter/flutter/pull/37198) [flutter_tool] Re-try sending the first crash report [37210](https://github.com/flutter/flutter/pull/37210) do not strip symbols when building profile [37217](https://github.com/flutter/flutter/pull/37217) hide symbols from spotlight for App.framework [37331](https://github.com/flutter/flutter/pull/37331) [flutter_tool] Add missing toString() [37345](https://github.com/flutter/flutter/pull/37345) [flutter_tool] Include the local timezone in analytics timestamp [37378](https://github.com/flutter/flutter/pull/37378) Disable xcode indexing in CI via COMPILER_INDEX_STORE_ENABLE=NO argument [37422](https://github.com/flutter/flutter/pull/37422) [flutter_tool] Additional flutter manifest yaml validation [37440](https://github.com/flutter/flutter/pull/37440) Print message when HttpException is thrown after running flutter run [37457](https://github.com/flutter/flutter/pull/37457) Find the app bundle when the flavor contains underscores [37500](https://github.com/flutter/flutter/pull/37500) Avoid killing Flutter tool process (#37471) [37512](https://github.com/flutter/flutter/pull/37512) Enable track widget creation on debug builds [37514](https://github.com/flutter/flutter/pull/37514) [flutter_tool] Remove unintended analytics screen send [37521](https://github.com/flutter/flutter/pull/37521) have xcodeSelectPath also catch ArgumentError [37595](https://github.com/flutter/flutter/pull/37595) Closes #37593 Add flutter_export_environment.sh to gitignore [37654](https://github.com/flutter/flutter/pull/37654) Add missing library to flutter tools [BUILD.gn](http://build.gn/) [37731](https://github.com/flutter/flutter/pull/37731) Add metadata to indicate if the host app contains a Flutter module [37735](https://github.com/flutter/flutter/pull/37735) Remove unused no-build flag from the flutter run command [37743](https://github.com/flutter/flutter/pull/37743) Handle thrown maps and rejects from fe server [37792](https://github.com/flutter/flutter/pull/37792) Disable the progress bar when downloading the Dart SDK via Invoke-WebRequest [37863](https://github.com/flutter/flutter/pull/37863) Expose the timeline event names so they can be used in other systems that do tracing [37871](https://github.com/flutter/flutter/pull/37871) Catch failure to create directory in cache [37900](https://github.com/flutter/flutter/pull/37900) Listen to ExtensionEvent instead of TimelineEvent [37958](https://github.com/flutter/flutter/pull/37958) Catch FormatException caused by bad simctl output [37966](https://github.com/flutter/flutter/pull/37966) Remove ephemeral directories during flutter clean [37994](https://github.com/flutter/flutter/pull/37994) Remove no-constant-update-2018, the underlying issue has been resolved. [38101](https://github.com/flutter/flutter/pull/38101) Catch filesystem exception from flutter create [38102](https://github.com/flutter/flutter/pull/38102) Fix type error hidden by implicit downcasts [38296](https://github.com/flutter/flutter/pull/38296) use common emulator/device list [38339](https://github.com/flutter/flutter/pull/38339) [flutter_tool] Flip create language defaults to swift and kotlin [38342](https://github.com/flutter/flutter/pull/38342) remove bsdiff from [BUILD.gn](http://build.gn/) [38353](https://github.com/flutter/flutter/pull/38353) [flutter_tool] Observatory connection error handling cleanup [38472](https://github.com/flutter/flutter/pull/38472) [flutter_tool] Fix bug in manifest yaml validation [38486](https://github.com/flutter/flutter/pull/38486) Catch errors thrown into the Zone by json_rpc [38490](https://github.com/flutter/flutter/pull/38490) Fix publish cmd [38497](https://github.com/flutter/flutter/pull/38497) handle unexpected exit from frontend server [38575](https://github.com/flutter/flutter/pull/38575) fix rpc exception for real [38586](https://github.com/flutter/flutter/pull/38586) Don't reload if compilation has errors [38637](https://github.com/flutter/flutter/pull/38637) [flutter_tool] Throw tool exit on malformed storage url override [38652](https://github.com/flutter/flutter/pull/38652) Kill dead code [36860](https://github.com/flutter/flutter/pull/36860) Remove Chain terse parsing [36874](https://github.com/flutter/flutter/pull/36874) Adjust phrasing of features [36884](https://github.com/flutter/flutter/pull/36884) Unbreak build_runner ## 完整 PR 清單 您可以在[此處](/release/release-notes/changelogs/changelog-1.9.1)查看本版本所有已合併 PR 的完整清單。