How to add something on an image in swift

Question

I have an anatomic picture and on it, I want to print a image like a dot or something when the user taps on the first image (the body) to point out where does it hurts.

I've already read something on UITapGestureRecognizer, but I don't really understood how it works.

Answer 1

Try this:

override func viewDidLoad() {
    super.viewDidLoad()
    let gestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(ViewController.handleTap))
    self.imageView.addGestureRecognizer(gestureRecognizer)
}

@objc func handleTap(tap: UITapGestureRecognizer) {
    let circle = UIView()
    circle.center = tap.locationInView(imageView)
    circle.frame.size = CGSize(width: 30, height: 30)
    circle.layer.backgroundColor = UIColor.redColor().CGColor
    circle.layer.cornerRadius = 15
    imageView.addSubview(circle)
}