October 2009
Beginner
260 pages
7h 23m
English
Content preview from iPhone Game Development
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Objective-C Primer
The iPhone API uses the Objective-C language. Objective-C is an application of principles from Smalltalk to the C language. The idea was to combine the power of the C language, which is an industry standard, with the object-oriented programming approach of the Smalltalk language. The result is a language that might be confusing at first, but it makes sense once you understand a few concepts.
Figure 1-22. Editing the App ID in Info.plist
Figure 1-23. Setting the device as the build target
The first thing to know is that Objective-C is a strict superset of C. Anything that you can write in C you can compile using the Objective-C compiler. C-style structs, function calls, memory allocation, and pointers are all available. However, in addition to all of the normal C language syntax, Objective-C adds some of its own features as well, such as thread synchronization, try-catch blocks, and garbage collection. The primary improvement provided (and the reason for the language) is an object-oriented structure.
Classes
Classes in Objective-C are conceptually very similar to Java and C++ classes. A class is an object that contains data, called member variables, and functions, called methods. Just like in Java and C++, classes are usually defined before they can be used (although in ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.