Cell 'alpha' reverts back when zoom out.

[okankocyigit]

I've set alpha value for cells at cellForItemAt

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
  ....
 cell.alpha = 0.3
 return cell
}

After I zoom in and out, cell alpha reverts back to 1.

I've tried to set alpha value in referenceViewForPhotoWhenDismissingHandler, but it doesn't work either.

func zoomButtonTouchUpInside() {
    let galleryPreview = INSPhotosViewController(photos: photos, initialPhoto: currentPhoto, referenceView: cell)
    galleryPreview.overlayView = CustomGalleryViewOverlay(frame: CGRect.zero)
        
    galleryPreview.referenceViewForPhotoWhenDismissingHandler = { [weak self] photo in
        if let index = self?.photos.index(where: {$0 === photo}) {
            let indexPath = IndexPath(item: index, section: 0)
            var cell = self?.collectionView.cellForItem(at: indexPath) as? PhotoGalleryCollectionViewCell
            cell?.alpha = 0.3
            return cell
        }
        return nil
    }
    present(galleryPreview, animated: true, completion: nil)
}