在Swift中使用UIScrollView进行无限循环滚动

I am trying to make an infinite loop image gallery app. I did it by setting up a UIScrollView inside which I inserted UIImageViews. I am able to load 4 images and swipe between them, but the problem I have is how to implement the infinite scroll, so that after the last image, the first one appears and opposite.I am trying to make an infinite loop image gall