UIScrollView：当用户滚动时，我如何回收可滚动网格中的对象？

I've got an UIScrollView with a grid of images. Currently they're only 6, but there might be a few hundred some day. So of course it would be a bad idea to create a few hundred UIImageView objects inside that UIScrollView and fill them all up with image data. I think I was reading this somewhere in the Apple docs: They recommend to only create so mutch elemends as you need to fill up the scrollable visible area.I've got an UIScrollView with a grid of images.