adding black overlay with 0.3 opacity over UIImageView

Question

I have a UIImageView and I wanted to add a black overlay on top of it. What is the best way of doing this without having to override drawRect? I was thinking of adding a CALayer

Answer 1

Thanks to Mick MacCallum

Swift 3 Version

let overlay: UIView = UIView(frame: CGRect(x: 0, y: 0, width: cell.imageView.frame.size.width, height: cell.imageView.frame.size.height))
overlay.backgroundColor = UIColor(red: 0/255, green: 0/255, blue: 0/255, alpha: 0.1)
cell.imageView.addSubview(overlay)

I have used for Swift 2.2

let overlay: UIView = UIView(frame: CGRectMake(0, 0, cell.imageView.frame.size.width, cell.imageView.frame.size.height))
overlay.backgroundColor = UIColor(red: 0/255, green: 0/255, blue: 0/255, alpha: 0.1)
cell.imageView.addSubview(overlay)