Enlarging image view when tapped in MessageKit - Swift

Question

I am trying to enlarge an image in the MessageCollectionView in a cell when it is tapped, something standard in most messaging apps. I successfully am able to recognize the user's tap on each cell and determine if it is a photo or a text cell, but my imageTapped function doesnt seem to be triggering. The img value I am passing to the imageTapped function inside the didTapMessage function and looks like it is a UIImageView as expected. The console print inside imageTapped doesn't seem to be triggering, so it never enters that function. Maybe I am missing something simple here, but I feel like it should be going thru that function!

I am using Swift 5, iOS 13.2, and MessageKit.

Code:

// MARK: - MessageCellDelegate
// With help from:
// - https://github.com/MessageKit/MessageKit/issues/778
// - https://stackoverflow.com/questions/45536405/full-screen-an-image-inside-a-tableviewcell-when-tapped-swift
// - https://github.com/MessageKit/MessageKit/issues/261
extension RoomVC: MessageCellDelegate {
    func didTapMessage(in cell: MessageCollectionViewCell) {
        guard let indexPath = messagesCollectionView.indexPath(for: cell) else { return }
        guard let messagesDataSource = messagesCollectionView.messagesDataSource else { return }
        let message = messagesDataSource.messageForItem(at: indexPath, in: messagesCollectionView)
        switch message.kind {
            case .photo(let photoItem):
                log.info("Message is a photo.")
                if let img = photoItem.image{
                    self.imageTapped(image: img)
                }
            default:
                log.info("Message is not a photo.")
                break
        }
    }

    func imageTapped(image: UIImage){
        log.info("Entered the imageTapped function.")
        let newImageView = UIImageView(image: image)
        newImageView.frame = UIScreen.main.bounds
        newImageView.backgroundColor = .black
        newImageView.contentMode = .scaleAspectFit
        newImageView.isUserInteractionEnabled = true
        let tap = UITapGestureRecognizer(target: self, action: #selector(dismissFullscreenImage))
        newImageView.addGestureRecognizer(tap)
        self.view.addSubview(newImageView)
        self.navigationController?.isNavigationBarHidden = true
        self.tabBarController?.tabBar.isHidden = true
    }

    @objc func dismissFullscreenImage(_ sender: UITapGestureRecognizer) {
        self.navigationController?.isNavigationBarHidden = false
        self.tabBarController?.tabBar.isHidden = false
        sender.view?.removeFromSuperview()
    }
}

Answer 1

Not sure why I got downvoted for this question, but the solution we found was that we were passing the image in as nil to the url instead of image when we were grabbing the downloadUrl.

var kind: MessageKind {
        if let url = downloadURL {
            - return .photo(ImageMediaType(url: url, image: nil, placeholderImage: #imageLiteral(resourceName: "placeholder"), size: CGSize(width: 150, height: 150)))
            + return .photo(ImageMediaType(url: url, image: image, placeholderImage: #imageLiteral(resourceName: "placeholder"), size: CGSize(width: 150, height: 150)))
        }
        return .text(content)
    }