Created
February 16, 2020 14:24
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Dismissible 滑动删除
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import 'package:flutter/material.dart'; | |
void main() { | |
runApp( | |
MaterialApp( | |
title: "滑动删除", | |
home: MyApp(), | |
), | |
); | |
} | |
class MyApp extends StatelessWidget { | |
@override | |
Widget build(BuildContext context) { | |
// 构建30条数据 | |
List<String> items = List<String>.generate(30, (i) => "列表${i + 1}"); | |
return Scaffold( | |
appBar: AppBar( | |
title: Text("滑动删除"), | |
), | |
body: ListView.builder( | |
// 指定列表长度 | |
itemCount: items.length, | |
// 构建列表 | |
itemBuilder: (context, index) { | |
final item = items[index]; | |
// 返回一个可以被删除的列表项 | |
return Dismissible( | |
key: Key(item), | |
// 被删除回调 | |
onDismissed: (derection) { | |
// 移除指定索引项 | |
items.removeAt(index); | |
// 底部弹出消息提示当前项被删除了 | |
Scaffold.of(context).showSnackBar(SnackBar( | |
content: Text("$item 被删除了"), | |
)); | |
}, | |
child: ListTile( | |
title: Text("$item"), | |
), | |
); | |
}, | |
), | |
); | |
} | |
} |
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