Swift how to add tap gesture on uicollectionviewcell's child elements

Question

I have a UICollectionViewcell in my code

let cell = commentSection.dequeueReusableCell(withReuseIdentifier: cellId, for: indexPath) as! CommentCell

And in CommentCell i have got this imageview

let likeIcon: UIImageView = {
    let imv = UIImageView()
    imv.image = #imageLiteral(resourceName: "like")
    imv.translatesAutoresizingMaskIntoConstraints = false
    return imv
}()

I tried adding a tap gesture to likeIcon in CommentCell and also in cellForItemAt but none of them triggered it when clicking.How can i add gestureTapRecognizer to child element of cell?

Answer 1

Look at the code:

....
    let imageView = UIImageView()
    imageView.isUserInteractionEnabled = true
    let recognizer = UITapGestureRecognizer()
    recognizer.addTarget(self, action: #selector(yourHandleMethod(tapGestureRecognizer:)))
    imageView.addGestureRecognizer(recognizer)
....

func yourHandleMethod(tapGestureRecognizer: UITapGestureRecognizer) {
    print("tap")
}

Call this method update() outside in cellForItem (for every cell).

...
    cell.update()
...

// This method inside cell

func update() {
    let recognizer = UITapGestureRecognizer()
    recognizer.addTarget(self, action: #selector(yourHandleMethod(tapGestureRecognizer:)))
    imageView.addGestureRecognizer(recognizer)
}

Answer 2

Adding UIImageView and providing gesture recognizer will increase the complexity of your development. If you need action then use UIButton and set target action for button in cellForRowAtIndex

You can set either background image or image to UIButton .

Better keep processed image in UIImage object and assign it to UIButton.