swift - Swift 1.2 中让我困惑的变化

Question

我将 Xcode 更新到 6.3，发现我使用新的 Swift 1.2 的代码中出现了一些新错误。

user.signUpInBackgroundWithBlock {
    (success:Bool!, error:NSError!) -> Void in

    if !(error != nil) {
        println("sign up successfully")

        var loginAlert: UIAlertController = UIAlertController(title: "Sign Up", message: "Sign Up Succeeded", preferredStyle: UIAlertControllerStyle.Alert)
        self.presentViewController(loginAlert, animated: true, completion: nil)
        loginAlert.addAction(UIAlertAction(title: "Okay", style:

我遇到了这个错误:

Cannot invoke signUpInBackgroundWithBlock with an argument list of type ((Bool!, NSError!) -> void)

我该如何解决？

另一个

@IBAction func endend(sender: AnyObject) {        
    if (PFUser.currentUser() == nil) {
        PFUser.logInWithUsernameInBackground(usernameTextField.text, password: passwordTextField.text）{  
            (user:PFUser!, error:NSError!) -> Void in

            if user != nil {
                println("login chenggong")
                var tlvc = TimelineViewControllerTableViewController()                
                self.presentViewController(tlvc, animated: true, completion: nil)
            }
            else {
                println("failed")
            }        
        }    
    }
}

我遇到了这个错误:

“UITextField” does not have member named “text”.

关于 我有 3 个错误，它说

Expected “,” separator.

Expected expression in list of expressions.

Expected “)” in expressions.

我可以在 Swift 1.2 之前运行我的应用程序，但现在...

Answer 1

以下代码对我有用:

PFUser.logInWithUsernameInBackground(username.text as String!, password: password.text as String!){
                (loggedInuser: PFUser?, signupError: NSError?) -> Void in