Question

好的，这可能是非常常见的，但我无法在任何地方找到解决方案。当使用Facebook SDK处理作为SSO登录时，它在iOS模拟器中运行良好。但是，在实际设备上，它在一个非常具体的实例中失败：如果iPhone / iPad通过iOS中的设置登录到Facebook，则会返回“会话已关闭：用户取消登录”（错误时会生成此消息）收到的是FBErrorCategoryUserCancelled类型）。我试过这个的每一个例子：

已安装Facebook iOS应用并已登录设置 [FAIL]
已安装Facebook iOS应用，但未使用 [FAIL]
未安装Facebook iOS应用，并且设置已登录 [FAIL]
Facebook操作系统应用已安装并登录，未登录 [SUCCESS]
Facebook iOS应用已安装但未登录且设置未登录 [SUCCESS]
未安装Facebook iOS应用，且设置未登录 [SUCCESS]

这一切都与登录Facebook的设置有关。现在我知道其他人的应用程序可以让Facebook与登录的设置集成，所以我错过了什么？这是我的登录代码：

- (IBAction)loginWithFacebook:(id)sender {
    if (FBSession.activeSession.state == FBSessionStateOpen || FBSession.activeSession.state == FBSessionStateOpenTokenExtended) {
        [FBSession.activeSession closeAndClearTokenInformation];
    }
    [FBSession openActiveSessionWithReadPermissions:@[@"basic_info",@"public_profile",@"email"]
                                       allowLoginUI:YES
                                  completionHandler: ^(FBSession *session, FBSessionState state, NSError *error) {
        // Retrieve the app delegate
        AppDelegate* appDelegate = [UIApplication sharedApplication].delegate;
        // Call the app delegate's sessionStateChanged:state:error method to handle session state changes
        [appDelegate sessionStateChanged:session state:state error:error];
    }];
}

这是我的代码，它从AppDelegate处理所有这些：

- (void)sessionStateChanged:(FBSession *)session state:(FBSessionState) state error:(NSError *)error {
    // If the session was opened successfully
    if (!error && state == FBSessionStateOpen){
        NSLog(@"Session opened");
        [[FBRequest requestForMe] startWithCompletionHandler: 
            ^(FBRequestConnection *connection,
              NSDictionary<FBGraphUser> *user,
              NSError *error) {
            if (!error) {
                NSString *firstName = user.first_name;
                NSString *lastName = user.last_name;
                NSString *facebookId = user.id;
                NSString *email = [user objectForKey:@"email"];
                [Data facebookLogin:facebookId email:email firstName:firstName lastName:lastName];
            }
        }];
    return;
    }
    if (state == FBSessionStateClosed || state == FBSessionStateClosedLoginFailed){
        // If the session is closed
        NSLog(@"Session closed");
    }
    // Handle errors
    if (error){
        NSLog(@"Error");
        NSString *alertText;
        NSString *alertTitle;
        // If the error requires people using an app to make an action outside of the app in order to recover
        if ([FBErrorUtility shouldNotifyUserForError:error] == YES){
            alertTitle = @"Something went wrong";
            alertText = [FBErrorUtility userMessageForError:error];
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle: @"Notice" message: alertText delegate: nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
            [alert show];
        } else {
            // If the user cancelled login, do nothing
            if ([FBErrorUtility errorCategoryForError:error] == FBErrorCategoryUserCancelled) {
                // This is the part that gets called, right here!
                NSLog(@"User cancelled login");
                // Handle session closures that happen outside of the app
            } else if ([FBErrorUtility errorCategoryForError:error] == FBErrorCategoryAuthenticationReopenSession){
                alertTitle = @"Session Error";
                alertText = @"Your current session is no longer valid. Please log in again.";
                NSLog(@"%@",alertText);
                // Here we will handle all other errors with a generic error message.
                // We recommend you check our Handling Errors guide for more information
                // https://developers.facebook.com/docs/ios/errors/
            } else {
                //Get more error information from the error
                NSDictionary *errorInformation = [[[error.userInfo objectForKey:@"com.facebook.sdk:ParsedJSONResponseKey"] objectForKey:@"body"] objectForKey:@"error"];
                // Show the user an error message
                alertTitle = @"Something went wrong";
                alertText = [NSString stringWithFormat:@"Please retry. \n\n If the problem persists contact us and mention this error code: %@", [errorInformation objectForKey:@"message"]];
                NSLog(@"%@",alertText);
            }
        }
        // Clear this token
        [FBSession.activeSession closeAndClearTokenInformation];
        // Show the user the logged-out UI
    }
}

我知道这是一个很长的帖子，但我认为在讨论这个问题时提供所有信息会更有益。

Answer 1

我有类似的问题。我认为正在发生的事情是本机iOS登录机制在@"public_profile"权限上窒息（或者更可能是服务器对它的响应，它来自Facebook）。要进行验证，请尝试从权限数组中删除此权限。

这是一个恼人的问题，因为Facebook文档声明此权限现在是强制性的。

当登录设置时，iOS Facebook与signin的集成不起作用

1 个答案: