Similar UITapGestureRecognizer Actions for Many ImageView - swift

Question

I am relatively new to Swift.
I have many images (though right now I am testing with four) which I am trying to hide (temporarily to make sure the foundational code is working, instead I really want to insert an image under the tapped image) when they are tapped.
I have created an array of ImageViews which I plan to expand once I have working code. I tried to add UITapGestureRecognizers to each ImageView using a for loop in addGestures() and then have selectImage() hide the tapped ImageView. The code compiles without error, but fails with uncaught NSException when one of these images is tapped. Any tips on how to do this effectively without too much manual coding for each image?
Code attached

Answer 1

Please check below code
func addGestureRecognizer(){
for imageView in imageArray{
imageView.isUserInteractionEnabled = true
let tap = UITapGestureRecognizer(target: self, action: #selector(handleTap(gesture:)))
imageView.addGestureRecognizer(tap)
}
}
#objc func handleTap(gesture:UITapGestureRecognizer){
let imageView = gesture.view
imageView?.isHidden = true
}
in your code you're passing imageView instead of gesture on selector.however you can get imageView by gesture.view.
Also there is no need for separate function for enable userInteraction.

Answer 2

Here is what you can try
class GestureStackVC: UIViewController {
/// Image Outlets
#IBOutlet weak var img1: UIImageView!
#IBOutlet weak var img2: UIImageView!
#IBOutlet weak var img3: UIImageView!
/// ImageView Array
var imagesArray : [UIImageView]?
/// Image Gesture
var imageTapGesture : UITapGestureRecognizer?
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
/// Allocate Array
imagesArray = [UIImageView]()
/// Add Required Values
imagesArray = [img1,img2,img3]
/// Add gesture
for imageView in imagesArray!{
let tap = UITapGestureRecognizer(target: self, action: #selector(imageTapHandler(_:)))
imageView.isUserInteractionEnabled = true
imageView.addGestureRecognizer(tap)
}
}
/// tap Handler
#objc func imageTapHandler(_ sender: UITapGestureRecognizer) {
/// Hide the Sender View
sender.view?.isHidden = true
/// Done
}
}
First Output with 3 Images
Output when clicked On first ImageView1 - Results its hidden
Output when clicked On first ImageView2 - Results its hidden