June 2011
Intermediate to advanced
590 pages
19h 31m
English
Content preview from iOS Programming: The Big Nerd Ranch Guide, Second 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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More on Low-Memory Warnings
You have seen how view controllers handle low-memory warnings – they are sent the message didReceiveMemoryWarning and release their view if it is not on the screen. This is an appropriate solution to handling a low-memory warning: an object gets rid of anything it isn’t currently using and can recreate later. Objects other than view controllers may have data that they aren’t using and can recreate later. The ImageStore is such an object – when its images aren’t on the screen, it is okay to destroy them because they can be loaded from the filesystem when they’re needed again.
Whenever a low-memory warning occurs, UIApplicationDidReceiveMemoryWarningNotification is posted to the notification center. Objects that want ...
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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.