A UIView Extension to help debug auto layout issues

JiggleViews.swift

extension UIView {
    func exerciseAmbiguityInLayoutRepeatedly(_ recursive: Bool) {
        #if DEBUG
            if hasAmbiguousLayout {
                Timer.scheduledTimer(timeInterval: 0.5,
                                     target: self,
                                     selector: #selector(exerciseAmbiguityInLayout),
                                     userInfo: nil,
                                     repeats: true)
            }
            if recursive {
                for subview in subviews {
                    subview.exerciseAmbiguityInLayoutRepeatedly(true)
                }
            }
        #endif
    }
}