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85 lines
2.4 KiB
Dart
85 lines
2.4 KiB
Dart
/**
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* Created with Android Studio.
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* User: ryan
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* Date: 2019/1/1
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* Time: 下午4:10
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* email: zhu.yan@alibaba-inc.com
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* tartget: SliverAppBar 的示例
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*/
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import '../../../../common/widget-demo.dart';
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import '../../../../routers/application.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter_markdown/flutter_markdown.dart';
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import './demo.dart' as SliverAppBarDemo;
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const String _Text0 =
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"""### **简介**
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> SliverAppBar “应用栏”
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- 它类似于Android中的toolbar。
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""";
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const String _Text1 =
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"""### **基本用法**
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> 虽然基本相同，构造方法也是非常的简单，但是却不能直接使用它，由官方文档可以看到通常结合ScrollView来使用它。
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- AppBar 和 SliverAppBar 都是继承StatefulWidget 类，都代表 Toobar。
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- 二者的区别在于 AppBar 位置的固定的应用最上面的;而 SliverAppBar 是可以跟随内容滚动的。
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- 下面的示例,放在 NestedScrollView 实现上提到顶的悬停。
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""";
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class Demo extends StatefulWidget {
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static const String routeName = '/components/Bar/SliverAppBar';
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@override
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_DemoState createState() => _DemoState();
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}
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class _DemoState extends State<Demo> {
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@override
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Widget build(BuildContext context) {
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return WidgetDemo(
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title: 'SliverAppBar',
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codeUrl: '${Application.github['widgetsURL']}componentss/Bar/SliverAppBar/demo.dart',
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child: allCheckboxs(context, this),
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docUrl: 'https://docs.flutter.io/flutter/widgets/SliverAppBar-class.html',
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);
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}
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}
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/*
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* 所有的 SliverAppBar widget
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* context: 运行上下文
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* that: 指向有状态的 StatefulWidget
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*/
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Widget allCheckboxs(BuildContext context, _DemoState that) {
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return Container(
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//padding: new EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
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child: Column(
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//mainAxisSize: MainAxisSize.max,
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children: <Widget>[
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MarkdownBody(data: _Text0),
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SizedBox(height: 20.0), // 间距
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MarkdownBody(data: _Text1),
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SizedBox(height: 20.0), // 间距
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SliverAppBarDemo.SliverAppBarLessDefault()
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])
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);
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}
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/*
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* 带align的text
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* */
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Widget textAlignBar(String txt) {
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return new Align(
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alignment: FractionalOffset.centerLeft,
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child: Column(
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children: <Widget>[
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SizedBox(height: 20.0),
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MarkdownBody(data: txt)
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])
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);
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}
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