未定义的类“FirebaseUser”

Question

我是新来的。我有一个关于Firebase Auth/ Google Auth的问题，FirebaseUser未定义代码:

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

我在AuthResult上也面临同样的问题

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

Answer 1

在最新版本的firebase_auth中，类FirebaseUser更改为User，类AuthResult更改为UserCredentail。因此，将 FirebaseUser 更改为 User

Answer 2

匿名用户

从< code>firebase_auth 0.18.0开始，< code>FirebaseUser类已更改为< code>User

Answer 3

在最新版本的< code>firebase_auth中，类< code>FirebaseUser更改为< code>User，类< code>AuthResult更改为< code>UserCredential。因此，请将您的代码更改为以下内容:

    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 已更改為 User

身份验证结果更改为 UserCredential

< code > Google auth provider . get credential()更改为< code > Google auth provider . credential()

通知用户登录状态更改的onAuthStateChanged被替换为AuthStateChange（）

currentUser（）是一种检索当前登录用户的方法，已替换为属性currentUser，并且不再返回未来

以上两种方法的示例：

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

和：

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

禁止使用firebaseUser的用户更新信息类。updateProfile方法。例子：

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

现在

import 'package:firebase_auth/firebase_auth.dart' as firebaseAuth;
Future updateName(String name, auth.User firebaseUser) async {
  firebaseUser.updateProfile(displayName: name);
  await firebaseUser.reload();
}