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61 lines
1.6 KiB
Dart
61 lines
1.6 KiB
Dart
/**
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* Created with Android Studio.
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* User: ryan
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* Date: 2019/1/6
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* Time: 下午7:33
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* email: sanfann@alibaba-inc.com
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* tartget: TabBar 的示例
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*/
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import 'package:flutter/material.dart';
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class ScaffoldDemo extends StatefulWidget {
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const ScaffoldDemo() : super();
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@override
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State<StatefulWidget> createState() => _ScaffoldDemo();
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}
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/*
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* AppBar 默认的实例,有状态
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* */
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class _ScaffoldDemo extends State with SingleTickerProviderStateMixin {
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int count = 0;
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@override
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void initState() {
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super.initState();
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}
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@override
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void dispose() {
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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// 如果省略了 leading ，但 AppBar 在带有 Drawer 的 Scaffold 中，则会插入一个 button 以打开 Drawer。
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// 否则，如果最近的 Navigator 具有任何先前的 router ，则会插入BackButton。
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// 这种行为可以通过设置来关闭automaticallyImplyLeading 为false。在这种情况下，空的 leading widget 将导致 middle/title widget 拉伸开始。
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return SizedBox(
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height: 500,
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child: Scaffold(
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appBar: AppBar(
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title: Text('Sample Code'),
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),
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body: Center(
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child: Text('You have pressed the button times. $count'),
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),
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floatingActionButtonLocation:
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FloatingActionButtonLocation.centerDocked,
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floatingActionButton: FloatingActionButton(
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onPressed: () => setState(() {
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count += 1;
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}),
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tooltip: 'Increment Counter',
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child: Icon(Icons.add),
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),
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));
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}
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}
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