demo
import 'package:flutter/material.dart';
void main() => runApp(new MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: RaisedButton(
child: Text('跳转到 screen2'),
onPressed: () {
Navigator.of(context).push(MaterialPageRoute(
builder: (context) => Screen2(),
));
},
),
));
}
}
class Screen2 extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: RaisedButton(
child: Text('back'),
onPressed: () {
Navigator.of(context).pop(null);
},
),
),
);
}
}
配置 routes 跳转
import 'package:flutter/material.dart';
void main() => runApp(new MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Ajnauw',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(),
routes: <String, WidgetBuilder>{
'/a': (BuildContext context) => MyPage(title: 'page A'),
'/b': (BuildContext context) => MyPage(title: 'page B'),
'/c': (BuildContext context) => MyPage(title: 'page C'),
},
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key}) : super(key: key);
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final List<String> _pages = <String>['/a', '/b', '/c'];
String togoPage = '/b';
_handleRadioValueChange(String nv) {
setState(() {
togoPage = nv;
});
}
// 返回一个小widget
Widget _generagorRadio(String pageName) {
return GestureDetector(
onTap: () {
_handleRadioValueChange(pageName);
},
child: Container(
decoration: BoxDecoration(
color: Colors.grey[200],
),
margin: EdgeInsets.only(top: 8.0),
child: Row(
children: <Widget>[
Radio(
value: pageName,
onChanged: _handleRadioValueChange,
groupValue: togoPage,
),
Text(pageName),
],
),
),
);
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('demo'),
),
body: ListView(
children: <Widget>[
Container(
margin: EdgeInsets.only(left: 8.0, right: 8.0),
child: Column(
children: _pages
.map((String pageName) => _generagorRadio(pageName))
.toList(),
),
),
Container(
margin: EdgeInsets.only(left: 8.0, right: 8.0, top: 8.0),
child: RaisedButton(
onPressed: () {
// 点击触发事件，页面入栈
Navigator.pushNamed(context, togoPage);
},
color: Theme.of(context).primaryColor,
child: Text('跳转新页面 $togoPage'),
),
),
],
),
);
}
}
class MyPage extends StatelessWidget {
final String title;
MyPage({Key key, this.title}) : super(key: key);
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(title),
),
body: Center(
child: Text(title),
),
);
}
}
动画页面路劲转换
Navigator.of(context).push(
PageRouteBuilder(
transitionDuration: Duration(milliseconds: 500),
pageBuilder: (context, animation, secondaryAnimation) =>
Screen2(),
transitionsBuilder:
(context, animation, secondaryAnimation, child) {
var begin = Offset(0.0, 1.0);
var end = Offset.zero;
var curve = Curves.ease;
var tween = Tween(begin: begin, end: end);
var curvedAnimation = CurvedAnimation(
parent: animation,
curve: curve,
);
return SlideTransition(
position: tween.animate(curvedAnimation),
child: child,
);
},
),
);
pushReplacement
通过推送给定路线替换导航器的当前路线，然后在新路线完成动画输入后处置前一路线
Navigator.of(context).pushReplacement(
MaterialPageRoute(builder: (context) => HomePage())
)
设置404页面
MaterialApp(
navigatorObservers: [routeObserver],
home: HomePage(),
title: 'home',
onUnknownRoute: (RouteSettings settings) {
return MaterialPageRoute(
builder: (context) => Title(
title: '页面未找到',
color: Theme.of(context).primaryColor,
child: Scaffold(
appBar: AppBar(),
body: Center(child: Text('404')),
),
),
settings: RouteSettings(
name: 'not-found',
),
);
},
);
设置不同的进场/出场动画
Navigator.of(context).push(
PageRouteBuilder(
transitionDuration: Duration(milliseconds: 500),
pageBuilder: (context, animation, secondaryAnimation) =>
Scaffold(
backgroundColor: Colors.red,
body: Center(child: Text('page 2')),
floatingActionButton: FloatingActionButton(
child: Icon(Icons.backspace),
onPressed: () => Navigator.of(context).pop(),
),
),
transitionsBuilder: (
context,
Animation<double> animation,
Animation<double> secondaryAnimation,
child,
) {
return SlideTransition(
position: Tween(
// 关键点
begin: animation.status == AnimationStatus.reverse
? const Offset(-1.0, -1.0)
: const Offset(1.0, 1.0),
end: Offset.zero,
).animate(animation),
child: child,
);
}),
);