ios - 是否需要设置任何属性以允许双击(Swift)

Question

我无法检测到屏幕中的双击？我需要打开项目中的属性吗？

所以我尝试了这个，但它不起作用:

let tapRec = UITapGestureRecognizer()

tapRec.addTarget(self, action: #selector(GameScene.doubleTap))
tapRec.numberOfTapsRequired = 2
self.view!.addGestureRecognizer(tapRec)



@objc func doubleTap(){
   print ("tap")
}

Answer 1

试试这个:

let tapRec = UITapGestureRecognizer(target: self, action: #selector(handleDoubleTap(_:)))
tapRec.delegate = self
tapRec.numberOfTapsRequired = 2
view.userInteractionEnabled = true
view.addGestureRecognizer(tapRec)

然后是你的函数:

extension YourViewController: UIGestureRecognizerDelegate {
    func handleDoubleTap(_ gesture: UITapGestureRecognizer){
        print("doubletapped")
    }
}

希望这有帮助!