Debug ColorsDebug all the views!!!before: after: Usage:override func viewDidAppear(animated: Bool) { super.viewDidAppear(animated) debugColors() }func layoutSubviews() { super.layoutSubviews() debugColors() }Implementation:extension UIView { func debugColors() { func randomColor() -> UIColor { func randomCGFloat() -> CGFloat { return CGFloat(arc4random()) / CGFloat(UInt32.max) } return UIColor( red: randomCGFloat(), green: randomCGFloat(), blue: randomCGFloat(), alpha: 0.7) } for eachSubview in subviews { eachSubview.backgroundColor = randomColor() eachSubview.debugColors() } } } extension UIViewController { func debugColors() { view.debugColors() } }