Now updated for the new "Modern Objective-C" features introduced with the iOS 6 SDK, the goal of this book is to teach the skills necessary to program in Objective-C using a style that is easy to follow, rich in examples and accessible to those who have never used Objective-C before. Topics covered include the fundamentals of Objective-C such as variables, looping and flow control. Also included are details of object oriented programming, working with files and memory and the Objective-C Foundation framework.Regardless of whether you are developing for Mac OS X or the iPhone, or just want to learn Objective-C, this book covers everything you need to know about the Objective-C language in 31 detailed and easy to follow chapters.Topics covered in this Third Edition of Objective-C 2.0 Essentials include:- The History of Objective-C- Installing Xcode and Compiling Objective-C on Mac OS X- Objective-C 2.0 Data Types- Working with Variables and Constants in Objective-C- Objective-C Operators and Expressions- Objective-C 2.0 Operator Precedence- Commenting Objective-C Code- Objective-C Flow Control with if and else- The Objective-C switch Statement- Objective-C Looping - The for Statement- Objective-C Looping with do and while Statements- An Overview of Objective-C Object Oriented Programming- Writing Objective-C Class Methods- Objective-C - Data Encapsulation, Synthesized Accessors and Dot Notation- Objective-C Inheritance- Pointers and Indirection in Objective-C- Objective-C Dynamic Binding and Typing with the id Type- Objective-C Variable Scope and Storage Class- An Overview of Objective-C Functions- Objective-C Enumerators- An Overview of the Objective-C Foundation Framework- Working with String Objects in Objective-C- Understanding Objective-C Number Objects- Working with Objective-C Array Objects- Objective-C Dictionary Objects- Working with Directories in Objective-C- Working with Files in Objective-C- Constructing and Manipulating Paths with NSPathUtilities- Copying Objects in Objective-C- Using Objective-C Preprocessor Directives