Chapter 5: Introducing Classes and Objects in Objective-C
In This Chapter
Understanding objects
Designing objects
Creating classes
Using objects
Objective-C is object-oriented. Code is assembled from objects defined by class templates; instances are created and released dynamically and controlled by messages. Cocoa is a mix of object-oriented features and conventional C, blended with practical tools and techniques for creating and managing objects.
This chapter is a first look at the theory of object-oriented development in Objective-C and introduces class definitions, messaging, and constructors. The chapters that follow illustrate the practice and explain how to create links between Objective-C code and the contents of a nib file.
Understanding Objects
Objects can represent concrete data or abstract processes and relationships. Some of the advantages of an object-oriented approach include:
Abstraction. Objects make application design simpler by hiding low-level complexity. You can concentrate on creating clean relationships between the elements in your application.
Encapsulation. ...
