xcode - 如何使 UIImageView 可点击并使其执行某些操作？ ( swift )

Question

(我几天前才开始使用 Swift，对编程还比较陌生，所以请耐心等待。)我正在尝试让随机 block 出现在屏幕上，用户必须点击它们才能使它们消失。我已经能够创建 block ，但我不知道如何真正使它们可点击。有人可以帮帮我吗？到目前为止，这是我的代码:

func createBlock(){

    let imageName = "block.png"
    let image = UIImage(named: imageName)
    let imageView = UIImageView(image: image!)

    imageView.frame = CGRect(x: xPosition, y: -50, width: size, height: size)
    self.view.addSubview(imageView)



    UIView.animateWithDuration(duration, delay: delay, options: options, animations: {

        imageView.backgroundColor = UIColor.redColor()

        imageView.frame = CGRect(x: self.xPosition, y: 590, width: self.size, height: self.size)

        }, completion: { animationFinished in


            imageView.removeFromSuperview()


    })



}

编辑:这是我正在尝试的新代码:

func createBlock(){


    let imageName = "block.png"
    let image = UIImage(named: imageName)
    let imageView = UIImageView(image: image!)

    imageView.frame = CGRect(x: xPosition, y: -50, width: size, height: size)
    self.view.addSubview(imageView)

    imageView.userInteractionEnabled = true
    let tapRecognizer = UITapGestureRecognizer(target: self, action: Selector("imageTapped"))
    imageView.addGestureRecognizer(tapRecognizer)

    func imageTapped(gestureRecognizer: UITapGestureRecognizer) {
        let tappedImageView = gestureRecognizer.view!
        tappedImageView.removeFromSuperview()
        score += 10
    }



    UIView.animateWithDuration(duration, delay: delay, options: options, animations: {

        imageView.backgroundColor = UIColor.redColor()
        imageView.frame = CGRect(x: self.xPosition, y: 590, width: self.size, height: self.size)

        }, completion: { animationFinished in


            imageView.removeFromSuperview()


    })



}

Answer 1

创建 View 后，您需要将其 userInteractionEnabled 属性设置为 true。然后你需要给它附加一个手势。

imageView.userInteractionEnabled = true
//now you need a tap gesture recognizer
//note that target and action point to what happens when the action is recognized.
let tapRecognizer = UITapGestureRecognizer(target: self, action: Selector("imageTapped:"))
//Add the recognizer to your view.
imageView.addGestureRecognizer(tapRecognizer)

现在您仍然需要函数，在本例中为 imageTapped:，这是识别手势时发生 Action 的地方。被识别的手势将作为参数发送，您可以从它们的手势 View 属性中找出哪个 imageView 被点击。

func imageTapped(gestureRecognizer: UITapGestureRecognizer) {
    //tappedImageView will be the image view that was tapped.
    //dismiss it, animate it off screen, whatever.
    let tappedImageView = gestureRecognizer.view!
}