Can'；t向UIAlertController（Swift）添加警报操作

我正在尝试向UI警报添加“确定”按钮，但无法使用alertController.addAction添加该按钮

在这种情况下我该怎么办

提前谢谢

if error == nil {
                let alert: UIAlertController = UIAlertController(title: "Account Created", message: "Please confirm your email", preferredStyle: .Alert)

                let okButton = UIAlertAction(title: "Ok", style: .Default) { action -> Void in
                    self.performSegueWithIdentifier("toMain", sender: self)

                    alertController.addAction(okButton)


                self.presentViewController(alert, animated: true, completion: nil)

                }

                } else {

                println("\(error)")
            }

警报

而不是

警报控制器

alert.addAction

应该在您的

ok按钮

操作之外

使用以下命令更改代码：

if error == nil {
    let alert: UIAlertController = UIAlertController(title: "Account Created", message: "Please confirm your email", preferredStyle: .Alert)

    let okButton = UIAlertAction(title: "Ok", style: .Default) { action -> Void in
        self.performSegueWithIdentifier("toMain", sender: self)

    }
    alert.addAction(okButton)

    self.presentViewController(alert, animated: true, completion: nil)
 } else {

            println("\(error)")
        }

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它的alert.addaction..不是alertcontroller