I still remember the beginning when I read this word ... I was wonder what kind of name in addition to '... and that means that is a set of "actions" already formed (technically the framework will call "library") that provided the developer, it will raise a whole series of laborious operations, mechanical, repetitive that for every program or you should go (for example, explain how to draw a window, and where to put close buttons, drop etc).
Well ... now that we understand this arrival to the point: the author of this book, teaches the basics of Objective-C programming, making us see the tools already 'ready craft and applied to our iPhone, but not the base that through the development of Mac OS X.This does not mean that absolutely does not teach how to program for iPhone or iPad OS, because the language is the same, makes us understand where we must begin. And where is' left to get the iPhone then.
Internet Marketing is Apple making accessible a library for programming on the Mac, iPhone or iPad and 'have created a modification of the library to integrate with a variety of functions.