Question

我的 .uid 说：getter 'uid' 没有为类型 'UserCredential' 定义。

我的代码：

 import 'package:firebase_auth/firebase_auth.dart';
 
 class AuthService {   final FirebaseAuth _firebaseAuth =
 FirebaseAuth.instance;
 
   Stream<String> get onAuthStateChanged =>
 _firebaseAuth.authStateChanges().map(
         (User user) => user?.uid,
       );
 
   Future<String>
 createUserWithEmailAndPassword(
       String email, String password, String name) async {
     final currentUser = await _firebaseAuth.createUserWithEmailAndPassword(
       email: email,
       password: password,
     );
 
     var updateInfo = UserUpdateInfo();
     await FirebaseAuth.instance.currentUser.updateProfile(displayName:name);
     await FirebaseAuth.instance.currentUser.reload();
     return FirebaseAuth.instance.currentUser.uid;   }
 
 Future<String>
 signInWithEmailAndPassword(
       String email, String password) async {
     return (await _firebaseAuth.signInWithEmailAndPassword(
             email: email, password: password))
         .uid;   }
 
   signOut() {
     return _firebaseAuth.signOut();   } }
 
 class UserUpdateInfo { }

我该如何解决？谢谢！

Answer 1

signInWithEmailAndPassword 方法返回一个 UserCredential object，它（如错误消息所述）没有 uid 属性。要从 UserCredential 访问 UID，请执行 credential.user.uid。

您正在寻找：

await (_firebaseAuth.signInWithEmailAndPassword(email: email, password: password)).user.uid

或者当分布在两行/语句上时更具可读性：

var credentials = await _firebaseAuth.signInWithEmailAndPassword(email: email, password: password);
return credentials.user.uid

.uid：未为“UserCredential”类型定义 getter“uid”。 - 颤振，FirebaseAuth

1 个答案: