Animate UICollectionViewCell highlight

class CollectionViewController: UICollectionViewController {

	/* … */

	override func viewDidLoad() {
		super.viewDidLoad()
		collectionView.delaysContentTouches = false
	}
	
	override func collectionView(_ collectionView: UICollectionView, didHighlightItemAt indexPath: IndexPath) {
		let cell = collectionView.cellForItem(at: indexPath)
		UIView.animate(withDuration: 0.5, delay: 0, options: .beginFromCurrentState, animations: {
			cell?.transform = CGAffineTransform(scaleX: 0.90, y: 0.90)
		})
	}
	
	override func collectionView(_ collectionView: UICollectionView, didUnhighlightItemAt indexPath: IndexPath) {
		let cell = collectionView.cellForItem(at: indexPath)
		UIView.animate(withDuration: 0.5, delay: 0, options: .beginFromCurrentState, animations: {
			cell?.transform = .identity
		})
	}

}