UITapGestureRecognizer not changing contents of CollectionViewCell . Swift

I have a collection view with lots of different pictures, and I want that when a picture is tapped, a border comes around it.

I made a custom cell, and a UICollectionViewCell with the imageView embedding in another view (which is the outline) for the pic. So I set up a UITapGestureRecognizer which works to get the index, but when I set the outer view to have a boder it doesn't work.

Here is my Cell:

import UIKit

class PicViewCell: UICollectionViewCell {


    @IBOutlet weak var imageView: UIImageView!


    @IBOutlet weak var imageOutline: UIView!


}

This is in my UICollectionViewController:

override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
            let cell = collectionView.dequeueReusableCell(withReuseIdentifier: reuseIdentifier, for: indexPath) as! PicViewCell

            // Configure the cell

     let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleTap(sender:)))

            cell.imageOutline.addGestureRecognizer(tapGesture)




        return cell

Here is the method for the tapGesture

func handleTap(sender: UITapGestureRecognizer) {
        print("tap")

        if let indexPath = self.collectionView?.indexPathForItem(at: sender.location(in: self.collectionView)) {

            let cell = collectionView?.dequeueReusableCell(withReuseIdentifier: reuseIdentifier, for: indexPath) as! PicViewCell

    cell.imageOutline.layer.borderWidth = 5


        } else {
            print("")
        }


    }