Shake animation with swift

UIView+Animations.swift

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
            return radians
        }
        
        let shakeGroup: CAAnimationGroup = CAAnimationGroup()
        shakeGroup.animations = [translation, rotation]
        shakeGroup.duration = duration
        self.layer.addAnimation(shakeGroup, forKey: "shakeIt")
    }
        
func shake2() {
        let animation = CABasicAnimation(keyPath: "position")
        animation.duration = 0.07
        animation.repeatCount = 5
        animation.autoreverses = true
        animation.fromValue = NSValue(cgPoint: CGPoint(x:self.center.x - 10, y:self.center.y))
        animation.toValue = NSValue(cgPoint: CGPoint(x:self.center.x + 10, y:self.center.y))
        self.layer.add(animation, forKey: "position")
    }
}

shake2: for shaking just horizontally