小编jim*_*jim的帖子

我已经安装了Facebook SDK,遵循了所有要求,因为我可以从用户的Facebook帐户中提取数据,但是我登录后无法执行segue.

我收到一条错误消息:

警告: Attempt to present <viewController1> on <FBSDKContainerViewController> whose view is not in the window hierarchy!

这是我的代码:

    override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.


    if (FBSDKAccessToken.currentAccessToken() == nil) {

        print("not logged in")
    }
    else {

        print("logged in")
    }


    let loginButton = FBSDKLoginButton()
    loginButton.readPermissions = ["public_profile", "email", "user_friends"]
    loginButton.center = self.view.center
    loginButton.delegate = self
    self.view.addSubview(loginButton)
}

 func loginButton(loginButton: FBSDKLoginButton!, didCompleteWithResult result: FBSDKLoginManagerLoginResult!, error: NSError!) {


    if …