Spin bottle with UIGestureRecognizer

I am using this code now to spin bottle on button tap: @IBAction func spinButton(sender: AnyObject) { let rotateView = CABasicAnimation() let randonAngle = arc4random_uniform(360) + 720 rotateView.fromValue = 0 rotateView.toValue = Float(randonAngle) * Float(M_PI) / 180.0 rotateView.duration = 3 rotateView.delegate = self rotateView.repeatCount = 0 rotateView.removedOnCompletion = false rotateView.fillMode = kCAFillModeForwards rotateView.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseOut) bottleImageView.layer.addAnimation(rotateView, forKey: "transform.rotation.z") } But how can I rotate the button using gesture? So the harder/faster I move my finger, the faster the bottle will spin