Flutter 如何从Get.Dialog返回值?
如何从打开对话框小部件/AlertDialog的get.对话框中获取返回值?1。GetMaterialApp 在main.dart中,确保Flutter 如何从Get.Dialog返回值?,flutter,getx,Flutter,Getx,如何从打开对话框小部件/AlertDialog的get.对话框中获取返回值?1。GetMaterialApp 在main.dart中,确保MyApp返回的是GetMaterialApp而不是MaterialApp class MyApp extends StatelessWidget { // This widget is the root of your application. @override Widget build(BuildContext context) {
MyApp
返回的是GetMaterialApp
而不是MaterialApp
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return GetMaterialApp( // <-- Use GetMaterialApp
title: 'Flutter Demo',
home: MyHomePage(title: 'Flutter Examples'),
);
}
}
2.Get.dialog+Get.back(结果:X)
调用Get.dialog
期望异步返回值
onPressed: () async {
// assign return value to an observable
return lx.result.value = await Get.dialog(
。。。当使用Get.back(结果:X)
关闭对话框时返回,其中X
是通过Get.dialog
返回的动态值:
onPressed: () => Get.back(result: true),
完整示例:
我尝试了这种方式,但对话框再次打开。
onPressed: () => Get.back(result: true),
import 'package:flutter/material.dart';
import 'package:get/get.dart';
class LoginX extends GetxController {
RxBool result = false.obs;
}
class GetDialogReturnPage extends StatelessWidget {
final LoginX lx = Get.put(LoginX());
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('GetDialog Return Example'),
),
body: SafeArea(
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
Container(
child: Obx(() => Text('Value shows here: ${lx.result.value}')),
),
Container(
alignment: Alignment.center,
child: RaisedButton(
child: Text('Login'),
onPressed: () async {
// ** assign return value to an observable **
return lx.result.value = await Get.dialog(
AlertDialog(
content: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
RaisedButton(
child: Text('Good Login'),
onPressed: () => Get.back(result: true),
// ** result: returns this value up the call stack **
),
SizedBox(width: 5,),
RaisedButton(
child: Text('Bad Login'),
onPressed: () => Get.back(result: false),
),
],
)
)
);},
),
)
],
),
),
);
}
}