ios - 为什么注销时不解析重置 PFuser？

Question

我正在使用:

} else if segue.identifier == "logout" {

    var currentUser = PFUser.currentUser()
    PFUser.logOut()
}

单击注销按钮后，它会再次转到登录屏幕，但是如果我单击登录按钮，它会重新登录该用户，而无需再次输入任何凭据。

为什么不在注销时将用户重置为零？

@IBAction func logIn(sender: AnyObject) {

    if username.text == "" || password.text == "" {

       displayNewAlert("Field(s) Empty", message: "Please Enter a Username and Password")

    } else {

        activityIndicator = UIActivityIndicatorView(frame: CGRectMake(0, 0, 50, 50))
        activityIndicator.center = self.view.center
        activityIndicator.hidesWhenStopped = true
        activityIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.Gray
        view.addSubview(activityIndicator)
        activityIndicator.startAnimating()
        UIApplication.sharedApplication().beginIgnoringInteractionEvents()


        let user = PFUser()
        user.username = username.text
        user.password = password.text

        var errorMessage = "Please Try Again Later"

        PFUser.logInWithUsernameInBackground(username.text!, password: password.text!, block: { (user, error) -> Void in

            self.activityIndicator.stopAnimating()
            UIApplication.sharedApplication().endIgnoringInteractionEvents()

            if user != nil {

               self.performSegueWithIdentifier("login", sender: self)

            } else {

                if let errorString = error!.userInfo["error"] as? String {

                    errorMessage = errorString

                }

                self.displayNewAlert("Failed Log In", message: "Please enter a valid username and password")
            }
        })
    }
}

Answer 1

我为其他想知道的人解决了这个问题。我正在注销和登录之间做一个 Storyboard 。

我应该使用:

@IBAction func logOut(sender: AnyObject) {

    PFUser.logOut()
let currentUser = PFUser.currentUser()
    self.dismissViewControllerAnimated(true, completion: nil)
}

这是执行注销的正确方法。不是来自上面提到的

    segue.identifier == "....."