A. Introducing Objective-C
To help those who are new to Objective-C—the language behind iOS and the one you’ll use when making games for the iPhone, this appendix provides a quick introduction and overview of that programming language
Objective-C dates back to the early 1980’s when it was primarily written by Brad Cox and Tom Love, and inspired by the Smalltalk language. Their intention was to include some of the object-oriented (OO) features of Smalltalk, while remaining backward-compatible with C. Objective-C is most often described as a superset of C.
When creating iOS apps, much of the OpenGL ES code you will write will intermingle standard C and Objective-C. In fact, because the OpenGL ES API is written in C, you will be calling OpenGL methods ...