March 2013
Intermediate to advanced
1000 pages
34h 51m
English
Content preview from Programming iOS 6, 3rd 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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iCloud
Once your app is operating through UIDocument, iCloud compatibility falls right into your lap. You have just two steps to perform:
- Register for iCloud entitlements
In the Portal (Chapter 9), register your app and configure it to be enabled for iCloud (a simple checkbox); then create a provisioning profile for the app (obviously, while developing, this would be a Development profile), download it, and hand it over to Xcode.
Back in your project, edit the target; under Summary, check Enable Entitlements in the Entitlements section. This causes the entire entitlements mechanism to spring to life. The entitlements file is added to the project. The Enable iCloud checkbox is enabled; check it if it isn’t checked. You’ll also need one Ubiquity Container (listed just below the iCloud checkbox); if there isn’t one, add one, which will automatically be assigned your app’s bundle id.
- Obtain an iCloud-compatible directory
-
Early in your app’s lifetime, call NSFileManager’s
URLForUbiquityContainerIdentifier:(typically passing nil as the argument), on a background thread, to obtain the URL of a cloud-shared directory. It will probably be an app-specific directory inside file://localhost/private/var/mobile/Library/Mobile%20Documents/; you are given sandbox access to this directory even though strictly speaking it isn’t inside your sandbox area. Any documents your app puts here by way of a UIDocument subclass will be automatically shared into the cloud.
Thus, for example, having registered ...
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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.