我是Flutter的新手。我的 Firebase Auth / Google Auth 有问题
未定义FirebaseUser的
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.ymldependencies:
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
我也面临着与AuthResult相同的问题final AuthResult authResult = await _auth.signInWithCredential(credential);
最佳答案
从firebase_auth
版本0.18.0开始:
在最新版本的firebase_auth
中,类FirebaseUser
更改为User
,而类AuthResult
更改为UserCredentail
。因此,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
更改为User
AuthResult
更改为UserCredential
GoogleAuthProvider.getCredential()
更改为GoogleAuthProvider.credential()
通知用户登录状态更改的
onAuthStateChanged
已替换为authStateChanges()
currentUser()
是一种检索当前登录用户的方法,已被currentUser
属性取代,并且不再返回Future<FirebaseUser>
。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);
弃用
UserUpdateInfo
类的firebaseUser.updateProfile
方法。例:
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();
}