Ash Furrow lists a great list of resources for learning iOS development.

He mentions that books didn’t work for him although didn’t list the books he tried.

To get started, some people buy a book or find some good online tutorials. I tried both approaches, and the online tutorials were definitely better.

I’m going through Nerd Ranch’s “iOS Programming: The Big Nerd Ranch Guide” recommended to me by Marco Arment and it has been very good because it makes you do the example apps.