Swift crop a whole inside Blurred UIView

UIViewCropped.swift

    func createOverlay(frame: CGRect,
                       xOffset: CGFloat,
                       yOffset: CGFloat,
                       radius: CGFloat) -> UIView {
        // Step 1
//        let overlayView = UIView(frame: frame)
//        overlayView.backgroundColor = UIColor.black.withAlphaComponent(0.6)
        let blur = UIBlurEffect(style: .regular)
        let blurViewTop = UIVisualEffectView(effect: blur)
        blurViewTop.frame = view.bounds//CGRect(x: 0, y: 0, width: view.bounds.width, height: (view.bounds.height / 2) - 64)
        blurViewTop.autoresizingMask = [.flexibleWidth, .flexibleHeight]
        let overlayView = blurViewTop
        // Step 2
        let path = CGMutablePath()
        path.addRect(CGRect(x: (frame.width - kSizeOfTheRect) / 2, y: frame.height / 2 - kSizeOfTheRect, width: kSizeOfTheRect, height: kSizeOfTheRect))
      // remove the above line and add uncomment the line below to have circle whole
//        path.addArc(center: CGPoint(x: xOffset, y: yOffset),
//                    radius: radius,
//                    startAngle: 0.0,
//                    endAngle: 2.0 * .pi,
//                    clockwise: false)
        path.addRect(CGRect(origin: .zero, size: overlayView.frame.size))
        // Step 3
        let maskLayer = CAShapeLayer()
        maskLayer.backgroundColor = UIColor.black.cgColor
        maskLayer.path = path
        // For Swift 4.2
        maskLayer.fillRule = .evenOdd
        // Step 4
        overlayView.layer.mask = maskLayer
        overlayView.clipsToBounds = true

        return overlayView
    }