如何使 UIImageView 可点击并使其执行某些操作?(迅速) [英] How to make a UIImageView tappable and cause it to do something? (Swift)

问题描述

(我几天前刚开始使用 Swift，对编程还比较陌生，所以请耐心等待.)我试图让随机块出现在屏幕上，用户必须点击它们才能使它们消失.我已经能够创建块，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:

(I just started using Swift a few days ago and am relatively new to programming, so please bear with me.) I am trying to make random blocks appear on the screen, and the user must tap them to make them disappear. I have been able to create the blocks, but I have no idea how to actually make them tappable. Can someone please help me? This is my code so far:

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()


    })



}

这是我正在尝试的新代码:

This is the new code I am trying:

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()


    })



}

推荐答案

创建视图后，需要将其 userInteractionEnabled 属性设置为 true.然后你需要给它附加一个手势.

Once you've create the view, you need to set it's userInteractionEnabled property to true. Then you need to attach a gesture to it.

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)

现在您仍然需要该函数，在本例中为 imageTapped:，这是识别手势时发生动作的地方.被识别的手势将作为参数发送，您可以从它们的手势视图属性中找出点击了哪个 imageView.

Now you still need the function, in this case imageTapped:, which is where the action happens when the gesture is recognized. The gesture that was recognized will be sent as an argument, and you can find out which imageView was tapped from they gestures view property.

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

这篇关于如何使 UIImageView 可点击并使其执行某些操作?(迅速)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！