Become an Xcoder: Start Programming the Mac Using Objective-C
by B. Altenberg, A. Clarke, P. Mougin
Publisher: CocoaLab 2008
Number of pages: 69
A free book for starting with Cocoa using Objective-C. It teaches you the basics of programming, in particular Objective-C programming, using Xcode. This tutorial is written for non-programmers, and is aimed at leveling the learning curve as much as possible.
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by Feifan Zhou - Binpress
I will attempt to teach C and Objective-C as one language. Obj-C is a strict superset of plain C, which means that any valid C is also valid Obj-C. I will supply plenty of screenshots, and include exercises at the end of each lesson.
by Ryan Hodson - Smashwords
This book is both a concise quick-reference and a comprehensive introduction for newcomers to the Objective-C programming language. It walks through each language feature step-by-step, explaining complex programming concepts via hands-on examples.
- Apple Inc.
Objective-C is a small but powerful set of extensions to the standard ANSI C language. This document fully describes the Objective-C language. It concentrates on the Objective-C extensions to C, not on the C language itself.
- NeXT Software, Inc.
Objective-C is implemented as set of extensions to the C language. This book both introduces the object-oriented model that Objective-C is based upon and fully documents the language. It concentrates on the Objective-C extensions to C.