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Although Objective-C is (apart from its C base) a small language, the implications of its modest set of extensions are substantial. To use Objective-C effectively, you should follow tested design patterns and make judicious use of libraries. The intent of this handbook is to provide a quick reference to the most commonly used features and idioms of the language. It should be like a fast cache, the first stop for frequently used data. Because of its size, this handbook can present only an outline of the language, its libraries, and conventional patterns of usage. If you are interested in truly. | Although Objective-C is apart from its C base a small language the implications of its modest set of extensions are substantial. To use Objective-C effectively you should follow tested design patterns and make judicious use of libraries. The intent of this handbook is to provide a quick reference to the most commonly used features and idioms of the language. It should be like a fast cache the first stop for frequently used data. Because of its size this handbook can present only an outline of the language its libraries and conventional patterns of usage. If you are interested in truly understanding the Objective-C way of thinking you should also look at some of the texts listed in Section 1.17 at the end of this book. For supplementary information and corrections to this handbook see our web site at http www.oreilly.com catalo g obj ectcpr. 1.1.1 Typographic Conventions The following typographical conventions are used in this book Italic New terms URLs and filenames Constant Width Code examples and names of classes fields variables and methods Constant Width Bold Words that are reserved in C or Objective-C Constant Width Italic Text in an example that should be replaced by values you supply 1.1.2 Acknowledgments Many thanks to my attentive editor Jonathan Gennick who considers every word. Greg Parker gave valuable feedback about the Objective-C runtime Mark Bessey about the compiler and Nicola Pero about archiving. Paul Kmiec asked the tough questions that made me think about how to explain the answers. Thanks also to Jacek Artymiak Scott Anguish and Eric Buck for their very thorough technical review of this book. 1.2 What Is Objective-C Objective-C is an object-oriented language it supports hierarchies of substitutable types message-passing between objects and code reuse through inheritance. Objective-C adds these features to the familiar C programming language. Because Objective-C is an extension of C many properties of an Objective-C program depend on the .
