I saw some apps which is something like a puzzle. It first asks to select an image, and slice them and put into 4×4 or 5×5 squares randomly. One square will be empty and user can rearrange them by slide the image to empty slot.
I know how to slide the image. But main task is how to slick them into smaller images?
Is it possible?
Matt Long discusses this in his article Subduing
CATiledLayer.