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
Content preview from iOS Components and Frameworks: Understanding the Advanced Features of the iOS SDKBecome 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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Expiration Handler
The expiration handler for a background task will get called if the operating system decides the app has run out of time and/or resources and needs to be shut down. The expiration handler will get called on the main thread before the app is about to be shut down. Not much time is provided (at most it is a few seconds), so the handler should do a minimal amount of work.
__block UIBackgroundTaskIdentifier bTask =[[UIApplication sharedApplication]beginBackgroundTaskWithExpirationHandler:^{ NSLog(@"Background Expiration Handler called."); NSLog(@"Counter is: %d, task ID is %u.",counter,bTask); [[UIApplication sharedApplication] endBackgroundTask:bTask]; bTask = UIBackgroundTaskInvalid ...
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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.
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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.