iPhoto is an interesting one: the layout is done programatically, but the xibs are used to load the images. For example, the brush panel is all animated and arr

iPhoto is an interesting one: the layout is done programatically, but the xibs are used to load the images. For example, the brush panel is all animated and arranged in code, but xibs are used to hold the brush PNG images since it reduces the code burden (of manually creating the UIImageViews, etc etc).