forked from lxm_flutter/FlutterUnit
34 lines
975 B
Dart
34 lines
975 B
Dart
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import 'package:flutter/material.dart';
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/// create by 张风捷特烈 on 2020/9/21
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/// contact me by email 1981462002@qq.com
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/// 说明: 242 StatefulBuilder 需要传入 builder 属性进行构造组件，在 builder 中可以使用 StateSetter 改变构造子组件的状态，即可以不用创建类而实现一个局部刷新的组件。
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// {
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// "widgetId": 242,
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// "name": 'StatefulBuilder基本使用',
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// "priority": 1,
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// "subtitle":
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// "【builder】 : 组件构造器 【StatefulWidgetBuilder】",
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// }
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class StatefulBuilderDemo extends StatelessWidget {
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const StatefulBuilderDemo({Key? key}) : super(key: key);
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@override
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Widget build(BuildContext context) {
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int count = 0;
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return StatefulBuilder(
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builder: (ctx, setState) => ElevatedButton(
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child: Text("当前数字: $count"),
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onPressed: () {
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setState(() {
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count++;
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});
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},
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),
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);
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}
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}
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