如何在Flutter的小部件树中以子级打开新的MaterialPageRoute [英] How to open new MaterialPageRoute as a child in widget tree in Flutter
问题描述
在下面的示例中,当我按下新的MaterialPageRoute时,它将在与Flutter小部件树中的Home小部件相同的级别上创建.我希望将其作为Home小部件的子代,因此Home将成为Child小部件的父代.
In the example below when I push new MaterialPageRoute it is created on the same level as Home widget in the Flutter widget tree. I would like to have it as a child of widget Home, so Home would be a parent of Child widget.
这是完整的代码:
import 'package:flutter/material.dart';
void main() {
runApp(MaterialApp(
home: Home(),
));
}
class Home extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
body: Column(
children: <Widget>[
Center(
child: Text("This is home"),
),
RaisedButton(
child: Text("Open child view"),
onPressed: () {
Navigator.of(context)
.push(MaterialPageRoute(builder: (context) => Child()));
},
)
],
),
);
}
}
class Child extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
body: Container(
child: Text("Child view"),
));
}
}
小部件树的外观如下
我想要实现这一点,因为我想在Home小部件中初始化ScopedModel,并在我创建的每个新MaterialPageRoute中使它可用.
I want to achieve that because I would like to initialize the ScopedModel in Home widget and have it available in every new MaterialPageRoute I create.
推荐答案
我使用嵌套导航器解决了我的问题.
I solved my issue using nested Navigator.
这里是示例:
import 'package:flutter/material.dart';
void main() {
runApp(MaterialApp(
home: Home(),
));
}
var homeNavigatorKey = GlobalKey<NavigatorState>();
class Home extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
body: Navigator(
key: homeNavigatorKey,
onGenerateRoute: (settings) {
/*dirty code for illustration purposes only*/
if (settings.name == '/child') {
return MaterialPageRoute(builder: (context) => Child());
} else {
return MaterialPageRoute(
builder: (context) => Column(
children: <Widget>[
Center(
child: Text("This is home"),
),
RaisedButton(
child: Text("Open child view"),
onPressed: () {
homeNavigatorKey.currentState.pushNamed('/child');
},
)
],
));
}
},
),
);
}
}
class Child extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
body: Container(
child: RaisedButton(
onPressed: () => Navigator.of(context).pop(),
child: Text("Back to home"),
),
));
}
}
树看起来像这样
并允许将数据从家庭传递给每个孩子.
and allows for passing data from Home to every child.
如果您有任何更简单的解决方案,请随时发表评论或发表答案.
Feel free to comment or post answers if you have any simpler solution.
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