I\'m easily able to change the background color of a cell in the CellForItemAtIndexPath method
CellForItemAtIndexPath
func collectionView(collectionView: UICollectionView,
You can use this method for that:
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath){ var cell : UICollectionViewCell = collectionView.cellForItemAtIndexPath(indexPath)! cell.backgroundColor = UIColor.magentaColor() }