How to make tappable UIImages that run functions?(Swift) - swift

Question

(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()
self.life-=1
})
}
I want to make the block disappear when tapped; any suggestions on how I can do that?

Answer 1

It's extremely simple to do, just use a UITapGestureRecognizer. I typically initialize the recognizer as a global variable.
let tapRecognizer = UITapGestureRecognizer()
Then in your viewDidLoad:
// Replace with your function
tapRecognizer.addTarget(self, action: "removeBlock")
imageView.addGestureRecognizer(tapRecognizer)

Answer 2

func removeImage(gesture: UIGestureRecognizer) {
gesture.view?.removeFromSuperview()
}
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)
imageView.userInteractionEnabled = true // IMPORTANT
imageView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: "removeImage:"))
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)
}, { _ in
imageView.removeFromSuperview()
self.life-=1
})
}
Notice imageView.userInteractionEnabled = true it is really important because that will allow touch events on that view, it is set to false as defaul in UIImgageView.