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Commit 627097c

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Navigator的封装,让使用更方便。
Navigator的封装,让使用更方便。
1 parent b309aa3 commit 627097c

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import 'dart:collection';
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import 'package:flutter/material.dart';
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class RouteManager{
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BuildContext context;
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// 管理路由的map
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Map<String, WidgetBuilder> routeManagerMap = {};
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Map<String, Widget> routeMap = {};
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// 构造函数
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RouteManager(this.context);
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void pushNamed(String routeName){
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Navigator.of(context).pushNamed(routeName);
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}
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// key是 发送路由的标记 Value是要跳转的页面
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putRoutesMap(Map<String, Widget> map){
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routeMap = map;
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}
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_putRoutes(){
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routeMap.forEach((routeName, targetPage){
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routeManagerMap[routeName] = (BuildContext context) => targetPage;
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});
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}
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Map<String, WidgetBuilder> getRoutes(){
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return routeManagerMap;
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}
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}
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import 'package:flutter/material.dart';
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import 'navigator_util.dart';
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void main() => runApp(MyApp());
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RouteManager manager;
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void data(BuildContext context){
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manager = new RouteManager(context);
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Map<String,Widget> routes = {
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'/data2':Page2(),
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'/data3':Page3(),
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'/data4':Page4(),
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};
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manager.putRoutesMap(routes);
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}
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RouteManager getData(){
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return manager;
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}
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class MyApp extends StatelessWidget {
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@override
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Widget build(BuildContext context) {
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data(context);
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return MaterialApp(
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title: 'Flutter Demo',
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theme: ThemeData(
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primarySwatch: Colors.blue,
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),
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home: MyHomePage(title: 'Flutter Demo Home Page'),
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// 让路由管理更方便一些
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routes: getData().getRoutes(),
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);
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}
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}
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class MyHomePage extends StatefulWidget {
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MyHomePage({Key key, this.title}) : super(key: key);
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final String title;
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@override
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_MyHomePageState createState() => _MyHomePageState();
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}
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class _MyHomePageState extends State<MyHomePage> {
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(
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title: Text(widget.title),
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),
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body: Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: <Widget>[
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RaisedButton(
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onPressed: (){
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//Navigator.of(context).pushNamed('/data2');
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getData().pushNamed('/data2');
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},
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child: Text('打开Page2'),
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),
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RaisedButton(
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onPressed: (){
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//Navigator.of(context).pushNamed('/data3');
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getData().pushNamed('/data3');
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},
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child: Text('打开Page3'),
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),
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RaisedButton(
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onPressed: (){
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//Navigator.of(context).pushNamed('/data4');
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getData().pushNamed('/data4');
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},
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child: Text('打开Page4'),
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),
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],
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),
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),
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floatingActionButton: FloatingActionButton(
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onPressed: (){},
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tooltip: 'Increment',
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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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class Page2 extends StatefulWidget {
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@override
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_Page2State createState() => _Page2State();
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}
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class _Page2State extends State<Page2> {
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@override
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Widget build(BuildContext context) {
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return Text('hello');
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}
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}
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class Page3 extends StatefulWidget {
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@override
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_Page3State createState() => _Page3State();
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}
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class _Page3State extends State<Page3> {
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@override
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Widget build(BuildContext context) {
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return Text('hello');
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}
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}
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class Page4 extends StatefulWidget {
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@override
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_Page4State createState() => _Page4State();
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}
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class _Page4State extends State<Page4> {
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@override
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Widget build(BuildContext context) {
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return Text('hello');
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}
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}

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