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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Writing to filesystem with NSData
The images for Possession instances are created by user interaction and are only stored within the application. Therefore, the Documents directory is the best place to store them. Let’s extend the image store to save images as they are added and fetch them as they are needed. You can use the image key generated when the user takes a picture to name the image in the filesystem.
In this section, you are going to copy the JPEG representation of an image into a buffer in memory. Instead of just malloc’ing a buffer, Objective-C programmers have a handy class to create, maintain, and destroy these sorts of buffers – NSData. An NSData instance holds some number of bytes of binary data, and you’re going to use NSData ...
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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.