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86 lines
2.1 KiB
Dart
86 lines
2.1 KiB
Dart
/**
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* Created with Android Studio.
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* User: ryan
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* Date: 2019/1/2
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* Time: 上午12:06
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* email: zhu.yan@alibaba-inc.com
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* tartget: SnackBar 的示例
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*/
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import 'package:flutter_go/components/widget_demo.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 SnackBarDemo;
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const String _Text0 =
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"""### **简介**
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> SnackBar “屏幕底部消息”
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- 带有可选操作的轻量级消息，短暂显示在屏幕底部
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- SnackBar是用户操作后，显示提示信息的一个控件，类似Toast，会自动隐藏;
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""";
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const String _Text1 =
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"""### **基本用法**
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> Scaffold.of(context).showSnackBar()，传递描述消息的 SnackBar 实例;
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- 要控制SnackBar保持可见的时间，请指定持续时间。
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""";
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class Demo extends StatefulWidget {
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static const String routeName = '/components//Bar/SnackBar';
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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: 'SnackBar',
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codeUrl: 'components/Bar/SnackBar/demo.dart',
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contentList: [allDomes(context, this)],
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docUrl: 'https://docs.flutter.io/flutter/material/SnackBar-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 SnackBar 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 allDomes(BuildContext context, _DemoState that) {
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return Container(
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//padding: 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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SnackBarDemo.SnackBarLessDefault(),
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SizedBox(height: 20.0), // 间距
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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 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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