How do I share a UIImage between two ViewControllers programmatically? - ios

Question

I'm using this custom collectionView transition:
When a cell is selected, the UIImage in the cell is animated to transition seamlessly into the UIImageView in the detailViewController ,as seen in the GIF in this link.
However the issue is, the UIImage in the detailViewController's UIImageView is hard coded in, and will be the same for every selected cell from the UICollectionView. I have different images within my collectionViewCell's and this would obviously be a problem, so I need to somehow programmatically make my detailViewController's UIImageView Image to equal that of the selected collectionViewCell's UIImageView Image when the transition is completed.
Here's the code I used to try to achieve this:
class DetailViewController: UIViewController, ARNImageTransitionZoomable {
#IBOutlet weak var imageView: UIImageView!
var selectedCell = MasterCollectionViewController()
deinit {
println("deinit DetailViewController")
}
override func viewDidLoad() {
super.viewDidLoad()
imageView.layer.cornerRadius = 3.0
imageView.clipsToBounds = true
}
// MARK: - ARNImageTransitionZoomable
func createTransitionImageView() -> UIImageView {
var imageView = UIImageView(image: self.imageView.image)
imageView.contentMode = self.imageView.contentMode
imageView.clipsToBounds = true
imageView.userInteractionEnabled = false
imageView.frame = self.imageView!.frame
return imageView
}
func presentationBeforeAction() {
self.imageView.hidden = true
}
func presentationCompletionAction(completeTransition: Bool) {
self.imageView.hidden = false
self.imageView.image = selectedCell.selectedImageView?.image
}
func dismissalBeforeAction() {
self.imageView.hidden = true
}
func dismissalCompletionAction(completeTransition: Bool) {
if !completeTransition {
self.imageView.hidden = false
}
}
}
I added a variable "selectedCell" that is of type MasterCollectionViewController(), giving me reference to everything in that class.
Then in the animation/transitions completion, I attempted to set the selected cell's UIImage to that of my detailViewController's UIImageView Image with the line
func presentationCompletionAction(completeTransition: Bool) {
self.imageView.hidden = false
self.imageView.image = selectedCell.selectedImageView?.image
}
This didn't work, when the transition is complete, the UIImageView is just white with no image, just as it is on my storyboard. Somebody know any method I can implement?