Navigator的封装，让使用更方便。

Navigator的封装，让使用更方便。

Author: AweiLoveAndroid

projects/flutter-demo/lib/all_samples/router/navigator_encapsulation/navigator_util.dart

@@ -0,0 +1,40 @@
+import 'dart:collection';
+
+import 'package:flutter/material.dart';
+
+
+
+class RouteManager{
+
+  BuildContext context;
+  
+  // 管理路由的map
+  Map<String, WidgetBuilder> routeManagerMap = {};
+
+  Map<String, Widget> routeMap = {};
+
+  // 构造函数
+  RouteManager(this.context);
+
+  void pushNamed(String routeName){
+    Navigator.of(context).pushNamed(routeName);
+  }
+
+ // key是 发送路由的标记  Value是要跳转的页面
+  putRoutesMap(Map<String, Widget> map){
+    routeMap = map;
+  }
+
+  _putRoutes(){
+    routeMap.forEach((routeName, targetPage){
+      routeManagerMap[routeName] = (BuildContext context) => targetPage;
+    });
+  }
+
+
+  Map<String, WidgetBuilder> getRoutes(){
+    return routeManagerMap;
+  }
+
+
+}

projects/flutter-demo/lib/all_samples/router/navigator_encapsulation/test_navigator.dart

@@ -0,0 +1,136 @@
+import 'package:flutter/material.dart';
+import 'navigator_util.dart';
+
+void main() => runApp(MyApp());
+
+
+
+
+RouteManager manager;
+void data(BuildContext context){
+  manager = new RouteManager(context);
+
+  Map<String,Widget> routes = {
+      '/data2':Page2(),
+      '/data3':Page3(),
+      '/data4':Page4(),
+  };
+ manager.putRoutesMap(routes);
+}
+
+
+RouteManager getData(){
+  return manager;
+}
+
+
+class MyApp extends StatelessWidget {
+
+ 
+  @override
+  Widget build(BuildContext context) {
+
+    data(context);
+
+    return MaterialApp(
+      title: 'Flutter Demo',
+      theme: ThemeData(
+        primarySwatch: Colors.blue,
+      ),
+      home: MyHomePage(title: 'Flutter Demo Home Page'),
+      // 让路由管理更方便一些
+      routes: getData().getRoutes(),
+    );
+  }
+}
+
+class MyHomePage extends StatefulWidget {
+  MyHomePage({Key key, this.title}) : super(key: key);
+
+  final String title;
+
+  @override
+  _MyHomePageState createState() => _MyHomePageState();
+}
+
+class _MyHomePageState extends State<MyHomePage> {
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(widget.title),
+      ),
+      body: Center(
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: <Widget>[
+            RaisedButton(
+              onPressed: (){
+                //Navigator.of(context).pushNamed('/data2');
+                getData().pushNamed('/data2');
+              },
+              child: Text('打开Page2'),
+            ),
+            RaisedButton(
+              onPressed: (){
+                //Navigator.of(context).pushNamed('/data3');
+                getData().pushNamed('/data3');
+              },
+              child: Text('打开Page3'),
+            ),
+            RaisedButton(
+              onPressed: (){
+                //Navigator.of(context).pushNamed('/data4');
+                getData().pushNamed('/data4');
+              },
+              child: Text('打开Page4'),
+            ),
+          ],
+        ),
+      ),
+      floatingActionButton: FloatingActionButton(
+        onPressed: (){},
+        tooltip: 'Increment',
+        child: Icon(Icons.add),
+      ),
+    );
+  }
+}
+
+
+class Page2 extends StatefulWidget {
+  @override
+  _Page2State createState() => _Page2State();
+}
+
+class _Page2State extends State<Page2> {
+  @override
+  Widget build(BuildContext context) {
+    return Text('hello');
+  }
+}
+
+class Page3 extends StatefulWidget {
+  @override
+  _Page3State createState() => _Page3State();
+}
+
+class _Page3State extends State<Page3> {
+  @override
+  Widget build(BuildContext context) {
+    return Text('hello');
+  }
+}
+
+class Page4 extends StatefulWidget {
+  @override
+  _Page4State createState() => _Page4State();
+}
+
+class _Page4State extends State<Page4> {
+  @override
+  Widget build(BuildContext context) {
+    return Text('hello');
+  }
+}