In the iPhone sample code \"PhotoScroller\" from WWDC 2010, they show how to do a pretty good mimmic of the Photos app with scrolling, zooming, and paging of images. They al
Sorry Jonah, but I think that you cannot do what you want to.
I have been implementing a comic app using the same example as a reference and had the same doubt. Finally, I realized that, even if you could load the image and cut it into tiles the first time that you use it, you shouldn't. There are two reasons for that:
If these two reasons make no sense to you, and you still want to do it, I would use Quartz to create the tiles. CGImage function CGImageCreateWithImageInRect would be my starting point.