颤振导航 [英] Flutter navigation
本文介绍了颤振导航的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
有人可以解释为什么从pageE返回时为什么不打印efeioi
吗?
Can someone explain why not printing efeioi
when it is back from pageE?
A页
Navigator.pushNamed(context, PageB.ROUTE).then((onValue) {
print("efeioi");
});
页面B
Navigator.of(context)
.pushReplacementNamed(PageC.ROUTE, arguments: onValue);
PageC
Navigator.pushNamed(context, PageD.ROUTE,
arguments: onValue);
PageD
Navigator.pop(context); // back to Page C
页面C
Navigator.pushNamed(context, PageE.ROUTE,
arguments: onValue);
页面E
Navigator.of(context).popUntil(ModalRoute.withName(PageA.ROUTE));
我无法在Page E中使用Navigator.pop,因为它将返回到C页!
I can't use Navigator.pop in Page E because it will back to Page C!
我已经在此处上传了完整的代码
I have uploaded full code here
https://github.com/tony123S/navigation
推荐答案
根据您的要求,我已如下实现 main.dart
As per your requirement I have implemented as below main.dart
initState : this will be called when you navigate from E to A
refreshPage : it will not called as you already popped before returning to A Page
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: A(),
routes: <String, WidgetBuilder>{
'/A': (BuildContext context) => new A(),
'/B': (BuildContext context) => new B(),
'/C': (BuildContext context) => new C(),
'/D': (BuildContext context) => new D(),
'/E': (BuildContext context) => new E(),
},
);
}
}
class A extends StatefulWidget {
@override
_FirstRouteState createState() => _FirstRouteState();
}
class _FirstRouteState extends State<A> {
final String fromPage;
_FirstRouteState({Key key, @required this.fromPage});
@override
void initState() {
// TODO: implement initState
super.initState();
print("Called askdfjaksdfj");
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Page A'),
),
body: Center(
child: RaisedButton(
child: Text('Open B'),
onPressed: () {
// Navigate to second route when tapped.
// Navigator.push(
// context,
// MaterialPageRoute(builder: (context) => B()),
// );
Navigator.push(
context,
MaterialPageRoute(builder: (context) => B()),
).then((res) => refreshPage());
},
),
),
);
}
refreshPage() {
print("refresh page is called");
}
}
class B extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("B Page"),
),
body: Center(
child: RaisedButton(
onPressed: () {
// Navigate back to first route when tapped.
Navigator.of(context).pushNamed(
"/C",
);
},
child: Text('Go to C'),
),
),
);
}
}
class C extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("C Page"),
),
body: Center(
child: Column(
children: <Widget>[
RaisedButton(
onPressed: () {
// Navigate back to first route when tapped.
Navigator.pushNamed(
context,
"/D",
);
},
child: Text('Go to D'),
),
RaisedButton(
onPressed: () {
// Navigate back to first route when tapped.
Navigator.pushNamed(
context,
"/E",
);
},
child: Text('Go to E'),
),
],
),
),
);
}
}
class D extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("D Page"),
),
body: Center(
child: RaisedButton(
onPressed: () {
// Navigate back to first route when tapped.
Navigator.pop(context);
},
child: Text('Go back to C'),
),
),
);
}
}
class E extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("E Page"),
),
body: Center(
child: RaisedButton(
onPressed: () {
// Navigator.pop(context);
// Navigator.of(context).pushNamed("/A");
// Navigator.of(context).popUntil(ModalRoute.withName('/A'));
Navigator.of(context)
.pushNamedAndRemoveUntil('/A', (Route<dynamic> route) => false,);
},
child: Text('Go to A'),
),
),
);
}
}
请运行代码以更好地理解并发现困难
Please run code for better understanding and reply if you found any difficulty
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