建立水平清單

有時你可能會希望建立一個可以水平滾動的清單，而不是垂直滾動。 ListView 元件（Widget）支援水平清單。

請使用標準的 ListView 建構函式，並傳入一個水平的 scrollDirection，這樣就能覆寫預設的垂直方向。

ListView(
  // This next line does the trick.
  scrollDirection: Axis.horizontal,
  children: <Widget>[
    Container(width: 160, color: Colors.red),
    Container(width: 160, color: Colors.blue),
    Container(width: 160, color: Colors.green),
    Container(width: 160, color: Colors.yellow),
    Container(width: 160, color: Colors.orange),
  ],
),

import 'package:flutter/material.dart';

void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    const title = 'Horizontal List';

    return MaterialApp(
      title: title,
      home: Scaffold(
        appBar: AppBar(title: const Text(title)),
        body: Container(
          margin: const EdgeInsets.symmetric(vertical: 20),
          height: 200,
          child: ListView(
            // This next line does the trick.
            scrollDirection: Axis.horizontal,
            children: <Widget>[
              Container(width: 160, color: Colors.red),
              Container(width: 160, color: Colors.blue),
              Container(width: 160, color: Colors.green),
              Container(width: 160, color: Colors.yellow),
              Container(width: 160, color: Colors.orange),
            ],
          ),
        ),
      ),
    );
  }
}