What would you say is the required level of knowledge in Objective-C and iOS development to make most of this book?
I would say none. Coming from Ruby (and Rails), using RubyMotion makes it a lot easier to understand the iOS SDK. If you know Ruby and want to learn iOS development from scratch, this book is perfect IMHO.
Hey Bashar, as Gustavo pointed out you don’t need any existing knowledge of the existing iOS SDK. It goes over all of the iOS APIs from scratch and with a fresh reader in mind.
That being said (for anyone else reading this and interested), the book would also be a good read even if you did know some iOS, just to get comfortable with the RubyMotion workflow and more Ruby-like ways of expressing iOS patterns.
Thanks Gustavo and Clay