UILabel长按识别

Question

编辑：将正确的代码添加到下面的代码中。工作中。

我的游戏运行时有一个位于顶部的标签。我希望能够长按标签并调出主菜单。现在，当我长按时，应用程序崩溃并出现以下错误。

错误：

由于未捕获的异常“NSInvalidArgumentException”而终止应用程序，原因：“-[blocks1.ViewController longTap:]：无法识别的选择器发送到实例 0x101800000”*** 首先抛出调用堆栈：

我所拥有的基础知识：

var gameTopTitle = UILabel()

//this is all after my gameTopTitle is added to the screen
let longGesture = UILongPressGestureRecognizer(target: self, action: #selector(self.longTap))
gameTopTitle.addGestureRecognizer(longGesture)
gameTopTitle.isUserInteractionEnabled = true

和函数

    func longTap(sender : UIGestureRecognizer){
    print("Long tap")
    if sender.state == .ended {
        print("UIGestureRecognizerStateEnded")
        //Do Whatever You want on End of Gesture
    }
    else if sender.state == .began {
        print("UIGestureRecognizerStateBegan.")
        //Do Whatever You want on Began of Gesture
    }
}

Answer 1

尝试用这个

let longGesture = UILongPressGestureRecognizer(target: self, action: #selector(self.longTap))

我希望这可以帮助你