정의되지 않은 클래스 'FirebaseUser'

Aug 19 2020

저는 Flutter를 처음 사용합니다. Firebase Auth / Google Auth에 문제가 있습니다 . FirebaseUser 가 정의되지 않았습니다. 코드 :

FirebaseAuth _auth = FirebaseAuth.instance;
GoogleSignIn googleSignIn = GoogleSignIn();

Future<FirebaseUser> currentUser() async { // The Issue is here in the Future<>
  final GoogleSignInAccount account = await googleSignIn.signIn();
  final GoogleSignInAuthentication authentication =
      await account.authentication;

  final GoogleAuthCredential credential = GoogleAuthProvider.getCredential(
      idToken: authentication.idToken, accessToken: authentication.accessToken);

  final AuthResult authResult = await _auth.signInWithCredential(credential);
  final FirebaseUser user = authResult.user; // and here as I can't define this FirebaseUser object to return

  return user;
}

Pubspec.yml

dependencies:
  flutter:
    sdk: flutter


  cupertino_icons: ^0.1.3
  firebase_auth: ^0.18.0
  location: ^3.0.2
  page_transition: ^1.1.6
  google_sign_in: ^4.5.1
  flutter_facebook_login: ^3.0.0
  firebase_database: ^4.0.0

AuthResult에서도 동일한 문제에 직면합니다.

final AuthResult authResult = await _auth.signInWithCredential(credential);

답변

37 PeterHaddad Aug 19 2020 at 14:51

버전 firebase_auth0.18.0 부터 :

의 최신 버전 firebase_auth에서는 클래스 FirebaseUser가로 변경되고 User클래스 AuthResult가로 변경되었습니다 UserCredentail. 따라서 코드를 다음과 같이 변경하십시오.

    Future<User> currentUser() async {
      final GoogleSignInAccount account = await googleSignIn.signIn();
      final GoogleSignInAuthentication authentication =
          await account.authentication;

      final GoogleAuthCredential credential = GoogleAuthProvider.credential(
          idToken: authentication.idToken,
          accessToken: authentication.accessToken);

      final UserCredential authResult =
          await _auth.signInWithCredential(credential);
      final User user = authResult.user;

      return user;
    }

FirebaseUser 로 변경 User

AuthResult 로 변경 UserCredential

GoogleAuthProvider.getCredential() 로 변경 GoogleAuthProvider.credential()


onAuthStateChanged 사용자의 로그인 상태 변경에 대한 알림이 authStateChanges()

currentUser()현재 로그인 한 사용자를 검색하는 메서드가 속성으로 대체되었으며 currentUser더 이상 Future<FirebaseUser>.

위의 두 가지 방법의 예 :

FirebaseAuth.instance.authStateChanges().listen((event) {
   print(event.email);
});

과:

var user = FirebaseAuth.instance.currentUser;
print(user.uid);

Deprecation of UserUpdateInfo class for firebaseUser.updateProfile method. Example:

Future updateName(String name, FirebaseUser user) async {
  var userUpdateInfo = new UserUpdateInfo();
  userUpdateInfo.displayName = name;
  await user.updateProfile(userUpdateInfo);
  await user.reload(); 
}

now

import 'package:firebase_auth/firebase_auth.dart' as firebaseAuth;
Future updateName(String name, auth.User firebaseUser) async {
  firebaseUser.updateProfile(displayName: name);
  await firebaseUser.reload();
}
1 sleepingkit Aug 19 2020 at 14:50

Run

flutter pub get

Then rebuild your app.

1 PrathamSarankar Sep 17 2020 at 02:14

This can be your signin function with email and password as of Sept 2020.Initialze app is a new introduced method we must at least call once before we use any other firebase methods.

 Future<void> signin() async {
    final formState = _formkey.currentState;
    await Firebase.initializeApp();
    if (formState.validate()) {
      setState(() {
        loading = true;
      });
      formState.save();
      try {
        print(email);
        final User user = (await FirebaseAuth.instance
                .signInWithEmailAndPassword(email: email, password: password))
            .user;
      } catch (e) {
        print(e.message);
        setState(() {
          loading = false;
        });
      }
    }
  }
1 Maann Oct 28 2020 at 13:34

In the newest version of firebase_auth, the class FirebaseUser was changed to User, and the class AuthResult was changed to UserCredentail. Therefore change FirebaseUser to User

ChamodDissanayake Feb 04 2021 at 21:11

Since firebase_auth 0.18.0, the class FirebaseUser was changed to User