0
} else if segue.identifier == "logout" {
var currentUser = PFUser.currentUser()
PFUser.logOut()
}
我点击退出按钮后,它塞格斯登录屏幕再次,但是,如果我点击登录按钮就会记录用户回来,而无需投入任何凭据再次。
为什么没有把它的用户注销时重置为零?
@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")
}
})
}
}
你可以显示他们按下登录按钮时执行的代码吗? – Paulw11
@ Paulw11我为它添加了代码。检查出来 –
那么,您的用户名和密码的文本字段为空?为什么在闭包外部创建一个PFUser,然后在闭包内检查它是否为零?那是错的。在关闭时,你应该首先检查非零的错误。如果错误为零,则检查PFUser.currentUser是否为非零。你并不需要在所有 – Paulw11