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Make a Transparent Hole on an Overlay UIView
//
// MakeTransparentHoleOnOverlayView.swift
//
// Created by James Laurenstin on 2015-04-10.
// Copyright (c) 2015 Aldo Group Inc. All rights reserved.
//
import UIKit
class MakeTransparentHoleOnOverlayView: UIView {
@IBOutlet weak var transparentHoleView: UIView!
// MARK: - Drawing
override func drawRect(rect: CGRect) {
super.drawRect(rect)
if self.transparentHoleView != nil {
// Ensures to use the current background color to set the filling color
self.backgroundColor?.setFill()
UIRectFill(rect)
let layer = CAShapeLayer()
let path = CGPathCreateMutable()
// Make hole in view's overlay
// NOTE: Here, instead of using the transparentHoleView UIView we could use a specific CFRect location instead...
CGPathAddRect(path, nil, self.transparentHoleView.frame)
CGPathAddRect(path, nil, bounds)
layer.path = path
layer.fillRule = kCAFillRuleEvenOdd
self.layer.mask = layer
}
}
override func layoutSubviews () {
super.layoutSubviews()
}
// MARK: - Initialization
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
override init(frame: CGRect) {
super.init(frame: frame)
}
}
@murilogteixeira
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Thanks! This helped me solve a problem in my project.

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