November 2013
Intermediate to advanced
576 pages
19h 3m
English
book
iOS Components and Frameworks: Understanding the Advanced Features of the iOS SDK
by Kyle Richter, Joe Keeley
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Completing the Background Task
After a background task ID has been obtained, the actual work to be done in the background can commence. In the performBackgroundTask method some variables are set up to know where to start counting, to keep count of iterations, and to know when to stop. A reference to NSUserDefaults standardUserDefaults is established to retrieve the last counter used, and store the last counter with each iteration.
NSInteger counter = 0;NSUserDefaults *userDefaults =[NSUserDefaults standardUserDefaults];NSInteger startCounter =[userDefaults integerForKey:kLastCounterKey];NSInteger twentyMins = 20 * 60;
The background task for the sample app is trivial—it puts the thread to sleep for a second in a ...
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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.