AD-Paladins

extension UIView {
func shake(duration: CFTimeInterval) {
        let translation = CAKeyframeAnimation(keyPath: "transform.translation.x");
        translation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionLinear)
        translation.values = [-5, 5, -5, 5, -3, 3, -2, 2, 0]
        
        let rotation = CAKeyframeAnimation(keyPath: "transform.rotation.z")
        rotation.values = [-5, 5, -5, 5, -3, 3, -2, 2, 0].map {
            (let degrees: Double) -> Double in
            let radians: Double = (M_PI * degrees) / 180.0