March 2014
Intermediate to advanced
672 pages
40h 11m
English
Content preview from The Core iOS Developer’s Cookbook, Fifth 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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Resuming Downloads
One neat feature of NSURLSessionDownloadTask is support for resuming downloads. If a download fails, you can query the download task for a resume data blob. Connection error callbacks provide this resume data in the [error userInfo] dictionary, with the NSURLSessionDownloadTaskResumeData key. You can also cancel your download task and receive the most current resume data blob via a block handler:
[downloadTask cancelByProducingResumeData: ^(NSData *resumeData) { // save resume data }];
When you are ready to resume your download, you can use the session downloadTaskWithResumeData: or downloadTaskWithResumeData:completionHandler:, passing in the saved resume data blob to create a new ...
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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.