iOS Development 101
Getting started with Xcode and iOS
This book is available for download with iBooks on your Mac or iOS device. Multi-touch books can be read with iBooks on your Mac or iOS device. Books with interactive features may work best on an iOS device. iBooks on your Mac requires OS X 10.9 or later.
If you've ever wanted to get started with Objective-C, Cocoa, Xcode and everything else that you need to build iOS applications -- this is the definitive guide.
iPhone, iPad and Mac development is extremely lucrative, but often developers are put off by the initial complexity.
This book demystifies iOS development by taking you step by step, in text and in video, through building a simple app, giving it a nice UX, and most importantly deploying it to the app store.
All for less than the price of a cup of coffee!