August 2012
Beginner
432 pages
9h 39m
English
Content preview from iOS App Development Portable Genius
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Downloading and Installing Xcode
The App Store and Developer Program versions of Xcode are different—sometimes significantly different—and they’re installed in different ways. Before you get started with downloading and installation, let’s look at a critical element of Xcode, the SDK (Software Development Kit).
Xcode is a continual work in progress. The versions of iOS it supports change with almost every release, but Apple also varies key features without notice, and delivery and installation options also change. The information that follows is valid for the public release of Xcode 4.3 for iOS 5.1. Don’t be surprised if some of the details have changed again by the time you read this.
Understanding SDKs and betas
Xcode has two main components. The current toolset includes the tools you use to edit, build, test, and distribute apps. Xcode is a fairly mature application now, so these tools change relatively slowly.
As iOS develops, new features are added and old features become obsolete. The other component in Xcode is called the SDK (Software Development Kit), and it manages this information.
Internally, the SDK is a collection of files and supporting documentation that defines all the features in a single version of iOS. Whenever iOS is updated, Apple releases a new version of Xcode with an updated SDK.
This seems simple, but there are complications. Basically, Xcode is always ...
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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.