December 2011
Beginner
600 pages
11h 25m
English
Content preview from Programming in Objective-C, Fourth EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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8. Inheritance
In this chapter, you’ll learn about one of the key principles that makes object-oriented programming so powerful. Through the concept of inheritance, you will build on existing class definitions and customize them for your own applications.
It All Begins at the Root
You learned about the idea of a parent class in Chapter 3, “Classes, Objects, and Methods.” A parent class can itself have a parent. The class that has no parent is at the top of the hierarchy and is known as a root class. In Objective-C, you have the capability to define your own root class, but it’s something you normally won’t want to do. Instead, you’ll want to take advantage of existing classes. All the classes we’ve defined up to this point are descendants of ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.