我在验证OTP后创建了一个用于OTP验证的警报对话框,我将其关闭,然后又创建了另一个对话框以进行数据处理...然后关闭它。
结果:-
通过调用Navigator.of(context).pop();
进行OTP验证后,第一个OTP对话框关闭,然后弹出第二个对话框,但在调用Navigator.of(context).pop();
后没有关闭
我想做什么:
请帮助我解决此问题。
预先感谢!
答案 0 :(得分:2)
您可能忘记了代码中的await
。
尝试一下,
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: HomePage(),
);
}
}
class HomePage extends StatefulWidget {
@override
_HomePageState createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
TextEditingController _otpCtrl = TextEditingController();
void dispose() {
_otpCtrl.dispose();
super.dispose();
}
Future<void> _verifyOTP() async {
final String otp = await _inputOtp();
String otpValidationError;
if (otp != null) otpValidationError = await _sendOtpVerifyRequest();
print(otpValidationError);
}
Future<String> _sendOtpVerifyRequest() async {
showDialog(
context: context,
builder: (context) {
return Center(child: CircularProgressIndicator());
},
);
await Future.delayed(Duration(seconds: 2)); //TODO: Do post request here
Navigator.pop(context);
return null;
}
Future<String> _inputOtp() async {
final flag = await showDialog<bool>(
context: context,
builder: (context) {
return AlertDialog(
title: Text("Enter OTP"),
content: TextField(
controller: _otpCtrl,
decoration: InputDecoration(
hintText: "x x x x x x",
),
),
actions: <Widget>[
FlatButton(
child: Text("Cancel"),
onPressed: () {
Navigator.pop(context, false);
},
),
FlatButton(
child: Text("Confirm"),
onPressed: () {
Navigator.pop(context, true);
},
),
],
);
},
);
if (flag == true)
return _otpCtrl.text;
else
return null;
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: RaisedButton(
onPressed: _verifyOTP,
child: Text("Click Here"),
),
),
);
}
}