Build an Objective C Address Book app with Xcode

How to build an Objective C Address Book app with Xcode Don't know what Objective C (ObjC) is? Well, then you're going to need this three-part video tutorial demonstrating how to write an application that adds users as contacts to the Address Book on your Mac OS. You will be building a Cocoa application. Objective C is a reflective, object-oriented programming language which adds Smalltalk-style messaging to C.