UICollectionview cell selection

Question

i have made a grid of images and in order to show its selection i drew border for the image when selected. but the problem is when i select some image at the top and scroll down

Answer 1

This code is in Swift 3:

if self.selectedItemIndexPath != nil && indexPath.compare(self.selectedItemIndexPath) == .orderedSame {
    cell.imageView!.layer.borderColor = UIColor.red.cgColor
    cell.imageView!.layer.borderWidth = 4.0
} else {
    cell.imageView!.layer.borderColor = nil
    cell.imageView!.layer.borderWidth = 0.0
}

return cell