Xcode Pro 20 step by step Tutorials in Xcode 4.
Tutorials in Xcode Pro are so easy to follow so if you just started developing for the iPhone or have been for a while Xcode Pro is for you.
Xcode Pro Tutorials includes things like Page control, Recording your voice, vibrating the device,saving and loading High Scores, Shaking the device and many more awesome tutorials.
Xcode Pro is easy to understand it includes big text and detailed pictures.