我使用 flutter 有一段时间了,最近使用 Get 来实现状态管理。
我在打开加载对话框 1 和消息对话框时遇到问题。然后我想关闭加载对话框,但消息对话框是保持关闭的对话框。
import 'package:flutter/material.dart';
import 'package:get/get.dart';
class HomeController extends GetxController {
Future<void> openAndCloseLoadingDialog() async {
showDialog(
context: Get.overlayContext,
barrierDismissible: false,
builder: (_) => WillPopScope(
onWillPop: () async => false,
child: Center(
child: SizedBox(
width: 60,
height: 60,
child: CircularProgressIndicator(
strokeWidth: 10,
),
),
),
),
);
await Future.delayed(Duration(seconds: 3));
Get.dialog(
AlertDialog(
title: Text("This should not be closed automatically"),
content: Text("This should not be closed automatically"),
actions: <Widget>[
FlatButton(
child: Text("CLOSE"),
onPressed: () {
Get.back();
},
)
],
),
barrierDismissible: false,
);
await Future.delayed(Duration(seconds: 3));
Navigator.of(Get.overlayContext).pop();
}
}
上面的代码关闭了第二个对话框,而不是我想要的第一个对话框。任何人都可以就这个问题提供建议。
最佳答案
AlertDialog
的原因正在被解雇而不是 CircularProgressIndicator
是因为 AlertDialog
位于堆栈的顶部。您可以在这里拨打 Navigator.of(Get.overlayContext).pop();
解雇 CircularProgressIndicator
在显示 AlertDialog
之前.
基于提供的片段的示例代码。
import 'package:flutter/material.dart';
import 'package:get/get.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return GetMaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
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 _counter = 0;
final HomeController c = Get.put(HomeController());
void _incrementCounter() {
c.openAndCloseLoadingDialog();
// setState(() {
// _counter++;
// });
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'You have pushed the button this many times:',
),
Text(
'$_counter',
style: Theme.of(context).textTheme.headline4,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}
class HomeController extends GetxController {
Future<void> openAndCloseLoadingDialog() async {
showDialog(
context: Get.overlayContext,
barrierDismissible: false,
builder: (_) => WillPopScope(
onWillPop: () async => false,
child: Center(
child: SizedBox(
width: 60,
height: 60,
child: CircularProgressIndicator(
strokeWidth: 10,
),
),
),
),
);
await Future.delayed(Duration(seconds: 3));
// Dismiss CircularProgressIndicator
Navigator.of(Get.overlayContext).pop();
Get.dialog(
AlertDialog(
title: Text("This should not be closed automatically"),
content: Text("This should not be closed automatically"),
actions: <Widget>[
FlatButton(
child: Text("CLOSE"),
onPressed: () {
Get.back();
},
)
],
),
barrierDismissible: false,
);
// await Future.delayed(Duration(seconds: 3));
// Navigator.of(Get.overlayContext).pop();
}
}
关于Flutter 使用 Getx 关闭选定的对话框,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/63841151/