UICollectionViewCell delegate won't fire - swift

Question

I'm obviously doing something wrong but unable as of yet to determine where. I setup the cell as follows:
protocol PropertyPhotoCellDelegate: class {
func deletePropertyPhoto(cell: PropertyPhotoCell)
}
class PropertyPhotoCell: UICollectionViewCell {
weak var propertyPhotoCellDelegate: PropertyPhotoCellDelegate?
let deleteButton: UIButton = {
let button = UIButton()
let image = UIImage(named: "delete.png")
button.setImage(image, for: .normal)
button.showsTouchWhenHighlighted = true
button.isHidden = true
button.addTarget(self, action: #selector(handleDeleteButton), for: .touchUpInside)
return button
}()
var isEditing: Bool = false {
didSet {
deleteButton.isHidden = !isEditing
}
}
I've omitted setting up the cell views. Here is the selector
#objc fileprivate func handleDeleteButton() {
propertyPhotoCellDelegate?.deletePropertyPhoto(cell: self)
}
In the UICollectionViewController, I assign the delegate
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: kCellId, for: indexPath) as! PropertyPhotoCell
cell.photoImageView.image = photos[indexPath.item]
cell.propertyPhotoCellDelegate = self
return cell
}
This hides or shows the delete button on the cell for all the cells in view
override func setEditing(_ editing: Bool, animated: Bool) {
super.setEditing(editing, animated: animated)
navigationItem.rightBarButtonItem?.isEnabled = !editing
if let indexPaths = collectionView?.indexPathsForVisibleItems {
for indexPath in indexPaths {
if let cell = collectionView?.cellForItem(at: indexPath) as? PropertyPhotoCell {
cell.deleteButton.isHidden = !isEditing
}
}
}
}
And finally, conforming to the protocol here
extension PropertyPhotosController: PropertyPhotoCellDelegate {
func deletePropertyPhoto(cell: PropertyPhotoCell) {
if let indexPath = collectionView?.indexPath(for: cell) {
photos.remove(at: indexPath.item)
collectionView?.deleteItems(at: [indexPath])
}
}
}
I tap the UICollectionViewController Edit button and all the cells show the delete button as expected. Any of the cell's delete button highlights on tap, but I don't see the delegate getting called.

Answer 1

When the delegate is assigned in the UICollectionViewController, also set the selector for the cell.
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: kCellId, for: indexPath) as! PropertyPhotoCell
cell.photoImageView.image = photos[indexPath.item]
cell.propertyPhotoCellDelegate = self
cell.deleteButton.addTarget(cell, action: #selector(cell.handleDeleteButton), for: .touchUpInside)
cell.deleteButton.isHidden = true
return cell
}