firebase 无密码身份验证如何与 Flutter 应用程序的动态链接一起使用？

Question

When I click on verification link from my email , it opens my app running in background but didChangeAppLifecycleState method returns data as null and deepLink as set in firebase instead of the whole emailLink from my email, resulting in SignInWithEmailAndLink to fail as its supposed to match email address entered in widget from the link recieved.

Here's the code taken from this article https://medium.com/firebase-developers/dive-into-firebase-auth-on-flutter-email-and-link-sign-in-e51603eb08f8 :-

1.didChangeAppLifecycleState method

@override
void didChangeAppLifecycleState(AppLifecycleState state) async {
  if (state == AppLifecycleState.resumed) {
    final PendingDynamicLinkData data =
    await FirebaseDynamicLinks.instance.getInitialLink();
    if( data?.link != null ) {
      handleLink(data?.link);
    }
    FirebaseDynamicLinks.instance.onLink(
        onSuccess: (PendingDynamicLinkData dynamicLink) async {
          final Uri deepLink `enter code here`= dynamicLink?.link;
          handleLink(deepLink);
        }, onError: (OnLinkErrorException e) async {
      print('onLinkError');
      print(e.message);
    });
  }
}

2. handleLink method

void handleLink(Uri link) async {
  if (link != null) {
    final User user = (await _auth.signInWithEmailAndLink(
      email: _userEmail,
      link: link.toString(),
    ))
        .user;
    if (user != null) {
      setState(() {
        _userID = user.uid;
        _success = true;
    });
    } else {
    setState(() {
        _success = false;
      });
    }
  } else {
    setState(() {
      _success = false;
    });
  }
  setState(() {});
}

3. main method (initializing firebase)

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  runApp(MyApp());
}

Note: - Deeplink is a concept still new to me in flutter, so I have set it randomly in firebase. My register page has a WidgetsBindingObserver to help resume app lifecycle state. My signup and sign in code is in an email widget and I'm not using forms to validate my textfields.

Answer 1

it seems that after you signin with email link the firebase instance has been not updated before checking auth.SigninWithEMailLink() you need to update it in firebase instance like this

  var user= await auth.currentUser();
              await user.reload();
              user=await auth.currentUser();

if still you are facing problem please provide some more code to let me understand your issue properly