[英]call method in container flutter
I have class called A.dart in that I am usnign Interprogressbar as below我有一个叫做 A.dart 的类,因为我是下面的 Interprogressbar
new Container(
margin: const EdgeInsets.fromLTRB(0, 10, 0, 0),
child: IntervalProgressBar(
direction: IntervalProgressDirection.horizontal,
max: count,
progress: count1,
intervalSize: 2,
size: Size(600, 10),
highlightColor: Colors.pink,
defaultColor: Colors.grey,
intervalColor: Colors.transparent,
intervalHighlightColor: Colors.transparent,
reverse: false,
radius: 0)),
Once the user clicks a button I am navigating to another class from A.dart to a class called B.dart.一旦用户单击一个按钮,我就会导航到另一个类,从 A.dart 到一个名为 B.dart 的类。 Once use completes process in class B.dart I ll pop the class B.dart.
一旦使用在类 B.dart 中完成过程,我将弹出类 B.dart。 Again A.dart will be visible for the user.
A.dart 再次对用户可见。 So my question us how can I restart the IntervalProgressBar with the updated value once user comes from B.dart to A,dart.
所以我的问题是,一旦用户从 B.dart 转到 A,dart,我该如何使用更新后的值重新启动 IntervalProgressBar。
You can copy paste run full code below您可以在下面复制粘贴运行完整代码
You can await Navigator.push
then call setState
您可以
await Navigator.push
然后调用setState
void _gotoB() async {
String parameter = await Navigator.push(
context,
MaterialPageRoute(builder: (context) => RouteB()),
);
setState(() {
count1 = int.tryParse(parameter);
});
}
...
RaisedButton(
child: Text('Go back'),
onPressed: () {
Navigator.pop(context, _textEditingController.text);
},
),
working demo工作演示
full code完整代码
import 'package:flutter/material.dart';
import 'package:intervalprogressbar/intervalprogressbar.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int count = 10;
int count1 = 3;
void _gotoB() async {
String parameter = await Navigator.push(
context,
MaterialPageRoute(builder: (context) => RouteB()),
);
setState(() {
count1 = int.tryParse(parameter);
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Container(
margin: const EdgeInsets.fromLTRB(0, 10, 0, 0),
child: IntervalProgressBar(
direction: IntervalProgressDirection.horizontal,
max: count,
progress: count1,
intervalSize: 2,
size: Size(600, 10),
highlightColor: Colors.pink,
defaultColor: Colors.grey,
intervalColor: Colors.transparent,
intervalHighlightColor: Colors.transparent,
reverse: false,
radius: 0)),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _gotoB,
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}
class RouteB extends StatefulWidget {
@override
_RouteBState createState() => _RouteBState();
}
class _RouteBState extends State<RouteB> {
TextEditingController _textEditingController = TextEditingController();
@override
Widget build(BuildContext context) {
return SafeArea(
child: Scaffold(
body: Column(
children: [
TextField(
controller: _textEditingController,
),
RaisedButton(
child: Text('Go back'),
onPressed: () {
Navigator.pop(context, _textEditingController.text);
},
),
],
)),
);
}
}
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