I am creating an overlay of blurredView with a clear rectangle cutout in the middle. My code so far has achieved the opposite, ie a clearView with a blur cutout in the middle instead.
I have adapted my steps from the following posts, I appreciate if anyone could point me in the right direction.
Swift mask of circle layer over UIView
CALayer with transparent hole in it
let blurView = UIVisualEffectView(frame: CGRect(x: 0, y: 0, width: self.view.frame.width, height: self.view.frame.height))
blurView.effect = UIBlurEffect(style: UIBlurEffectStyle.dark)
let scanLayer = CAShapeLayer()
scanLayer.path = CGPath(rect: scanRect, transform: nil)
view.addSubview(blurView)
blurView.layer.addSublayer(scanLayer)
blurView.layer.mask = scanLayer