Part 2. Building your own objects
If you’re developing an Objective-C–based application, it won’t be long before you’re faced with the challenge of developing your own custom classes and objects. The classes provided by Foundation and UIKit can only take you so far. This part of the book begins with an explanation of how to create a class, and then expands into how to extend classes to specialize them, or adapt them for slightly different needs.
You’ll also delve deeper into the process of message sending, and how the dynamic nature of Objective-C allows for classes to behave in dynamic ways. With custom objects, memory allocation and management is always an important topic to master, so we round out with a discussion of proper memory management ...
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