There are many resources available for Objective-C. Here is the guide written by Apple for using the language (Objective-C) and the framework (Cocoa).

Programming with Objective-C (Mac Developer Library)

Here are some things that are important that you should know.

  1. Variable Lifetimes (where and when variables are accessible)
  2. Variable Typing – Strong AND Weak (variables containing objects)
  3. Reserved Words (words that can’t be used to name variables/methods/classes)
  4. Naming Conventions (how to name variables/methods/classes)

Pages for setup and installation are also provided:

Setup and Installation

Xcode (Mac)

GNUstep (Windows)


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