ios - UIButton 不会调用@IBAction

Question

我是 swift 的新手，尝试在点击 UIButton 时调用 loginAuth 方法。我所做的与我在 Objective-C 项目中所做的完全相同，但我不断收到以下错误:

[SwiftSwipeView.LoginViewController loginAuth]: unrecognized selector sent to instance

界面按钮

var logIn: UIButton!

viewDidLoad

    logIn = UIButton(frame: CGRect(x: (self.view.bounds.width/2)-(245/2), y: self.view.bounds.height-200, width: 245.00, height: 37.50));
    logIn.backgroundColor = UIColor(red:0.29, green:0.345, blue:0.4, alpha:1)
    logIn.setTitle("LOG IN", forState: UIControlState.Normal)

    logIn.titleLabel?.font =  UIFont(name: "Lato-Bold", size: 14)
    logIn.layer.cornerRadius = 5;
    logIn.clipsToBounds = true;
    logIn.addTarget(self, action: "loginAuth", forControlEvents: .TouchUpInside)
    self.view.addSubview(logIn)

登录验证方法

@IBAction func loginAuth(sender: UIButton!) {


    println("test")

}

Answer 1

您应该在实现时声明目标操作。

改变这个:

logIn.addTarget(self, action: "loginAuth", forControlEvents: .TouchUpInside)

到

logIn.addTarget(self, action: "loginAuth:", forControlEvents: .TouchUpInside)

此消息 unrecognized selector sent to instance 始终表示未实现要尝试执行的方法...