PFTwitterUtils logInWithBlock 总是为 userId 返回 nil

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PFTwitterUtils 的 logInWithBlock 方法总是返回 userId 为 nil.知道为什么会发生这种情况吗?

The logInWithBlock method of PFTwitterUtils always returns userId as nil. Any idea why this might be happening?

我使用的是 parse 版本:1.7.2

I am using parse version: 1.7.2

[PFTwitterUtils logInWithBlock:^(PFUser *user, NSError *error) { if (!user) { NSLog(@"Uh oh. The user cancelled the Twitter login."); return; } else if (user.isNew) { NSLog(@"User signed up and logged in with Twitter!"); if([PFTwitterUtils isLinkedWithUser:user]){ NSLog(@"userID %@", [PFTwitterUtils twitter].userId); } //... } else { NSLog(@"User logged in with Twitter!"); } }];

推荐答案

userId 为 nil 的原因是该用户已经在设备上登录.如果您在设备上进行了大量测试而忘记注销，则可能会发生这种情况.

The reason userId is nil is because this user has been already logged in on the device. This might happen if you are testing a lot on your device and forget to do a logout.

如果您在尝试再次登录之前先退出，那就没问题了.

If you logout before you attempt to login again it will be fine.

这里是一个测试示例:

[PFUser logOut]; [PFTwitterUtils logInWithBlock:^(PFUser *user, NSError *error) { if (!user) { NSLog(@"Uh oh. The user cancelled the Twitter login."); return; } else if (user.isNew) { NSLog(@"User signed up and logged in with Twitter!"); if([PFTwitterUtils isLinkedWithUser:user]){ NSLog(@"userID %@", [PFTwitterUtils twitter].userId); } //... } else { NSLog(@"User logged in with Twitter!"); } }];