PFFacebookUtils logIn 有时会创建新用户，有时会登录

Posted 2023-03-17

【中文标题】PFFacebookUtils logIn 有时会创建新用户，有时会登录

【英文标题】：PFFacebookUtils logIn sometimes creates new user, sometimes logs in

【发布时间】：2014-08-31 19:05:12

【问题描述】：

所以我使用 parse.com，自动匿名用户，并使用 facebook (ios) 登录/注册。问题在于，有时它会正确登录，而有时（大多数时候）它会创建一个似乎是匿名的新用户。新用户（匿名 -> 设为非匿名并与 facebook 链接）和登录用户（匿名 -> 与已链接的 facebook 登录）都会发生这种情况。

我使用的代码与 parse.com 文档中提供的代码基本相同。任何帮助，将不胜感激。这是我点击 Facebook 按钮时的代码。

NSArray *permissions = @[@"public_profile", @"email", @"user_friends", @"publish_actions"];
[SVProgressHUD showWithMaskType:SVProgressHUDMaskTypeGradient];
[PFFacebookUtils logInWithPermissions:permissions block:^(PFUser *user, NSError *error) 
    [SVProgressHUD dismiss];
    [SVProgressHUD showWithMaskType:SVProgressHUDMaskTypeGradient];
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^
        NSError *error = nil;
        //try refreshing the user in case that is the problem (its not, sometimes?).
        [user refresh:&error];
        if (error) 
            NSLog(@"ERROR. %@", error.localizedDescription);
        
        NSLog(@"%@", user);

        dispatch_async(dispatch_get_main_queue(), ^
            [SVProgressHUD dismiss];

            if (!user) 
                NSString *errorMessage = nil;
                if (!error) 
                    NSLog(@"User cancelled the Facebook login.");
                    errorMessage = @"User cancelled the Facebook login.";
                 else 
                    NSLog(@"Uh oh. An error occurred: %@", error);
                    errorMessage = [error localizedDescription];
                
                UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Log In Error"
                                                                message:errorMessage
                                                               delegate:nil
                                                      cancelButtonTitle:@"OK"
                                                      otherButtonTitles:nil];
                [alert show];
             else 
                if (user.isNew) 
                    NSLog(@"User for Facebook! (new user)");

                    [SVProgressHUD showWithMaskType:SVProgressHUDMaskTypeGradient];

                    FBRequest *request = [FBRequest requestForMe];
                    [request startWithCompletionHandler:^(FBRequestConnection *connection, id result, NSError *error) 
                        [SVProgressHUD dismiss];
                        if (!error) 
                            NSDictionary *userData = (NSDictionary *)result;
                            NSString *name = userData[@"name"];
                            user[@"displayName"] = name;
                            user[@"facebookName"] = name;
                            user[@"facebookId"] = [result objectForKey:@"id"];

                            [SVProgressHUD showWithMaskType:SVProgressHUDMaskTypeGradient];

                            [user saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) 
                                [SVProgressHUD dismiss];

                                if (error) 
                                    NSLog(@"%@", error.description);
                                
                                [self showProfileSetupView];

                                [Global checkAndUpdateTrophyWithIdentifier:TROPHYConnectWithFacebook inViewController:self.navigationController];
                            ];
                            NSLog(@"User signed up and logged in through Facebook!");

                         else 
                            if ([error.userInfo[FBErrorParsedJSONResponseKey][@"body"][@"error"][@"type"] isEqualToString:@"OAuthException"]) 
                                NSLog(@"The facebook session was invalidated");
                            
                            else 
                                NSLog(@"Some other error: %@", error);
                            
                        
                    ];
                 else 
                    NSLog(@"User logged in through Facebook!");

                    if (!user[@"displayName"] || !user[@"facebookName"] || !user[@"facebookId"]) 

                        [SVProgressHUD showWithMaskType:SVProgressHUDMaskTypeGradient];

                        FBRequest *request = [FBRequest requestForMe];
                        [request startWithCompletionHandler:^(FBRequestConnection *connection, id result, NSError *error) 
                            [SVProgressHUD dismiss];

                            if (!error) 
                                NSDictionary *userData = (NSDictionary *)result;
                                NSString *name = userData[@"name"];
                                user[@"displayName"] = name;
                                user[@"facebookName"] = name;
                                user[@"facebookId"] = [result objectForKey:@"id"];

                                [user saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) 
                                    if (error) 
                                        NSLog(@"%@", error.description);
                                    
                                ];
                                [self.delegate userSignUpViewControllerDidLogIn:self];

                             else 
                                if ([error.userInfo[FBErrorParsedJSONResponseKey][@"body"][@"error"][@"type"] isEqualToString:@"OAuthException"]) 
                                    NSLog(@"The facebook session was invalidated");
                                
                                else 
                                    NSLog(@"Some other error: %@", error);
                                
                            


                        ];
                    
                    else 
                        [self.delegate userSignUpViewControllerDidLogIn:self];
                    
                
            

        );
    );

];

【问题讨论】：

如果您允许匿名登录，请检查您的 parse.com 和 fb 应用设置

我已经在 parse.com 设置中“打开”了一切：匿名登录、facebook 登录、用户和密码、twitter。我不知道你所说的匿名登录的FB设置是什么意思。另外我还没有在 FB 中获得批准（可能是由于这个问题），所以我有几个测试帐户已获得该应用程序的授权

【参考方案1】：

如果您已经设置了用户的 email 字段，并且您尝试使用具有相同电子邮件的用户登录 Facebook，Parse 会在数据库中使用 FB 身份验证创建一个新的空用户。您可能想将 FB Authenticated 用户与具有相同电子邮件的现有用户链接？

如果是这样，您可以检查匿名/电子邮件用户是否与 facebook 连接，如果没有，请在连接前删除 email 字段。

检查与 facebook 的连接：[PFFacebookUtils isLinkedWithUser:[PFUser currentUser]]