创建一个水平 list

有时，您可能想要创建一个水平滚动（而不是垂直滚动）的列表。ListView本身就支持水平list。

在创建ListView时，设置scrollDirection为水平方向以覆盖默认的垂直方向。

new ListView(
  // This next line does the trick.
  scrollDirection: Axis.horizontal,
  children: <Widget>[
    new Container(
      width: 160.0,
      color: Colors.red,
    ),
    new Container(
      width: 160.0,
      color: Colors.blue,
    ),
    new Container(
      width: 160.0,
      color: Colors.green,
    ),
    new Container(
      width: 160.0,
      color: Colors.yellow,
    ),
    new Container(
      width: 160.0,
      color: Colors.orange,
    ),
  ],
)

完整的例子

import 'package:flutter/material.dart';
void main() => runApp(new MyApp());
class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final title = 'Horizontal List';
    return new MaterialApp(
      title: title,
      home: new Scaffold(
        appBar: new AppBar(
          title: new Text(title),
        ),
        body: new Container(
          margin: new EdgeInsets.symmetric(vertical: 20.0),
          height: 200.0,
          child: new ListView(
            scrollDirection: Axis.horizontal,
            children: <Widget>[
              new Container(
                width: 160.0,
                color: Colors.red,
              ),
              new Container(
                width: 160.0,
                color: Colors.blue,
              ),
              new Container(
                width: 160.0,
                color: Colors.green,
              ),
              new Container(
                width: 160.0,
                color: Colors.yellow,
              ),
              new Container(
                width: 160.0,
                color: Colors.orange,
              ),
            ],
          ),
        ),
      ),
    );
  }
}