Flutter开发(二十三)：ListView垂直和水平滚动

ListView 作为一个常用组件，需要经常联系，下面是垂直滚动：

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyApp> {
  List<String> NAMES = [
    '赵',
    '钱',
    '孙',
    '李',
    '周',
    '吴',
    '郑',
    '王',
    '冯',
    '陈',
    '楚',
    '魏',
    '蒋',
    '沈',
    '韩',
    '杨'
  ];

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Tabbed AppBar'),
        ),
        body: ListView(
          //改变滚动方向
          //scrollDirection: Axis.horizontal,
          scrollDirection: Axis.vertical,
          children: _myList(),
        ),
      ),
    );
  }

  List<Widget> _myList() {
    return NAMES.map((name) => _item(name)).toList();
  }

  Widget _item(String name) {
    return Container(
      height: 80,
      margin: EdgeInsets.only(bottom: 3),
      alignment: Alignment.center,
      decoration: BoxDecoration(color: Colors.teal),
      child: Text(
        name,
        style: TextStyle(color: Colors.white, fontSize: 16),
      ),
    );
  }
}

下面是水平滚动，只需要设置 scrollDirection 方向和样式即可：

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyApp> {
  List<String> NAMES = [
    '赵',
    '钱',
    '孙',
    '李',
    '周',
    '吴',
    '郑',
    '王',
    '冯',
    '陈',
    '楚',
    '魏',
    '蒋',
    '沈',
    '韩',
    '杨'
  ];

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Tabbed AppBar'),
        ),
        body: ListView(
          //改变方向
          scrollDirection: Axis.horizontal,
          // scrollDirection: Axis.vertical,
          children: _myList(),
        ),
      ),
    );
  }

  List<Widget> _myList() {
    return NAMES.map((name) => _item(name)).toList();
  }

  Widget _item(String name) {
    return Container(
      width: 80,
      margin: EdgeInsets.only(right: 3),
      alignment: Alignment.center,
      decoration: BoxDecoration(color: Colors.teal),
      child: Text(
        name,
        style: TextStyle(color: Colors.white, fontSize: 16),
      ),
    );
  }
}