在UIScrollView上设置UIButton的动画

I'm having problems animating my button in my scrollview. Basically what I'm doing is moving the button down the y-axis when the button is pressed down and moving it back to it's original position once the press has stopped. My code itself works just fine and does exactly what it is meant to do. Oddly enough, it only does so on a regular View. On a scrollView, it only moves it down after a short delay after it is pressed and the animation is very choppy. I know that there's nothing wrong with my code and that's why I'm so confused. Does anybody have an idea on how to fix this? Any help would be greatly appreciated!I'm having problems animating my button in my s