Flutter Sign in with apple failure - ios

Question

i implement sign in with apple on my apps, for some reason my server return error cause username length from sign in with apple didn't meet my condition and i didn't cache the information of the user. After that i update the server to remove username length requirement, but unfortunately user name and email is null? The solution i know is to stop using apple id from setting page on Iphone, is there any other solution from code? here is my code :
AppleSignInButton(
style: ButtonStyle.whiteOutline,
cornerRadius: 8,
type: ButtonType.signIn,
onPressed: () async {
var isConnected = await checkConnection();
if (!isConnected) {
showErrorDialog(message: ErrorMessage.NO_NETWORK);
} else {
final AuthorizationResult result = await AppleSignIn.performRequests([
AppleIdRequest(requestedScopes: [Scope.email, Scope.fullName])
]);
if (result != null) {
switch (result.status) {
case AuthorizationStatus.authorized:
_loginWithApple(result.credential);
break;
case AuthorizationStatus.cancelled:
break;
case AuthorizationStatus.error:
showErrorDialog(message: result.error.localizedFailureReason);
break;
}
} else {
showErrorDialog(message: result.status.toString(), onTap: (){});
}
}
},)

Answer 1

Apparently Apple provides the fullName and email fields for the first sign in only. These fields will be null for subsequent sign ins.
However, you may opt to get the fullName through appleIDCredential.fullName in didCompleteWithAuthorization delegate method, and update the user's profile yourself.
Source: https://github.com/firebase/firebase-ios-sdk/issues/4393#issuecomment-559012512

Answer 2

Add the dependency to your pubspec.yaml file .
You can get the latest version from https://pub.dev/packages/apple_sign_in
dependencies:
apple_sign_in: ^0.1.0
You can install packages from the command line:
$ flutter pub get
Alternatively, your editor might support flutter pub get like Android Studio and Visual Studio code.
import the “apple_sign_in.dart” to use it’s functionality .
import 'package:apple_sign_in/apple_sign_in.dart';
In initState( ) of Scaffold initialise the Functionality .
if(Platform.isIOS){
//check for ios if developing for both android & ios
AppleSignIn.onCredentialRevoked.listen((_) {
print("Credentials revoked");
});
}
Place the Apple Sign in button Specially provided for this operation .
AppleSignInButton(
style: ButtonStyle.black,
type: ButtonType.continueButton,
onPressed: appleLogIn,
);
Define the appleLogIn( ) method for the sign in functionality
if(await AppleSignIn.isAvailable()) {
//Check if Apple SignIn isn available for the device or not
}else{
print('Apple SignIn is not available for your device');
}
If Available then We can request for login
if(await AppleSignIn.isAvailable()) {
final authorizationResult result = await
AppleSignIn.performRequests([
AppleIdRequest(requestedScopes: [Scope.email, Scope.fullName])
]);
}
Handle the result according to your requirement
if(await AppleSignIn.isAvailable()) {
final AuthorizationResult result = await AppleSignIn.performRequests([
AppleIdRequest(requestedScopes: [Scope.email, Scope.fullName])
]);
switch (result.status) {
case AuthorizationStatus.authorized:
print(result.user);//All the required credentials
case AuthorizationStatus.error:
print("Sign in failed: ${result.error.localizedDescription}");
break;
case AuthorizationStatus.cancelled:
print('User cancelled');
break;
}
}
You can send the credentials to your backend on whatever you want to do .