flutter组件3【ListTile 的使用】

2020-11-13 15:43:45 浏览数 (1)

效果图

1. ListTile 通常用于在 Flutter 中填充 ListView

属性如下:

title: title 参数可以接受任何小部件,但通常是文本小部件

subtitle: 副标题是标题下面较小的文本

dense: 使文本更小,并将所有内容打包在一起

leading: 将图像或图标添加到列表的开头。这通常是一个图标。

trailing: 设置拖尾将在列表的末尾放置一个图像。这对于指示主-细节布局特别有用。

contentPadding: 设置内容边距,默认是 16,但我们在这里设置为 0

selected: 如果选中列表的 item 项,那么文本和图标的颜色将成为主题的主颜色。

Gesture recognition: ListTile 可以检测用户的点击和长按事件,onTap 为单击,onLongPress 为长按。对于波纹效果是内置的

enabled: 通过将 enable 设置为 false,来禁止点击事件

2.实例代码

代码语言:javascript复制
import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'My App',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Scaffold(
        appBar: AppBar(title: Text('ListTile guide')),
        body: BodyWidget(),
      ),
    );
  }
}

String horseUrl = 'https://i.stack.imgur.com/Dw6f7.png';
String cowUrl = 'https://i.stack.imgur.com/XPOr3.png';
String camelUrl = 'https://i.stack.imgur.com/YN0m7.png';
String sheepUrl = 'https://i.stack.imgur.com/wKzo8.png';
String goatUrl = 'https://i.stack.imgur.com/Qt4JP.png';

class BodyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return ListView(
      children: <Widget>[
        ListTile(
          leading: CircleAvatar(
            backgroundImage: NetworkImage(horseUrl),
          ),
          title: Text('Horse'),
          subtitle: Text('A strong animal'),
          trailing: Icon(Icons.keyboard_arrow_right),
          onTap: () {
            print('horse');
          },
          selected: true,
        ),
        ListTile(
          leading: CircleAvatar(
            backgroundImage: NetworkImage(cowUrl),
          ),
          title: Text('Cow'),
          subtitle: Text('Provider of milk'),
          trailing: Icon(Icons.keyboard_arrow_right),
          onTap: () {
            print('cow');
          },
        ),
        ListTile(
          leading: CircleAvatar(
            backgroundImage: NetworkImage(camelUrl),
          ),
          title: Text('Camel'),
          subtitle: Text('Comes with humps'),
          trailing: Icon(Icons.keyboard_arrow_right),
          onTap: () {
            print('camel');
          },
          enabled: false,
        ),
        ListTile(
          leading: CircleAvatar(
            backgroundImage: NetworkImage(sheepUrl),
          ),
          title: Text('Sheep'),
          subtitle: Text('Provides wool'),
          trailing: Icon(Icons.keyboard_arrow_right),
          onTap: () {
            print('sheep');
          },
        ),
        ListTile(
          leading: CircleAvatar(
            backgroundImage: NetworkImage(goatUrl),
          ),
          title: Text('Goat'),
          subtitle: Text('Some have horns'),
          trailing: Icon(Icons.keyboard_arrow_right),
          onTap: () {
            print('goat');
          },
        ),
      ],
    );
  }
}

0 人点赞