UI Controller like in Apple's Book Application?

First of all I'm new 开发者_JS百科to IOS Development!

I have a plan to build an app which should look similar to the Book app provided by Apple. My question is, that what kind of UI Controller does that app use for displaying the books on a shelf? Is that a custom one? Or just a couple of UIImageView's placed on a UIView?

Thanks in advance!

It is a custom view created by Apple but it wouldn't be too difficult to replicate with a background image and a UIScrollView where the books are placed based on calculation on spacing

Edit: Maybe using a Library such as AQGridView would help you with the spacing of the books on the Shelf