How This Book Is Organized
This book is divided into three logical parts. Part I, “The Objective-C Language,” teaches the essentials of the language. Part II, “The Foundation Framework,” teaches how to use the rich assortment of predefined classes that form the Foundation framework. Part III, “Cocoa, Cocoa Touch, and the iOS SDK,” gives you an overview of the Cocoa and Cocoa Touch frameworks and then walks you through the process of developing a simple iOS application using the iOS SDK.
A framework is a set of classes and routines that have been logically grouped together to make developing programs easier. Much of the power of programming in Objective-C rests on the extensive frameworks that are available.
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