December 2013
Intermediate to advanced
464 pages
14h 46m
English
book
Learning Mobile App Development: A Hands-on Guide to Building Apps with iOS and Android
by Jakob Iversen, Michael Eierman
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Working with NSUserDefaults Object
The NSUserDefaults object is used to store data values for an app in a key-value list on the disk. Working with NSUserDefaults is very simple. You start by getting a reference to the standard NSUserDefaults object with this line of code:
NSUserDefaults *settings = [NSUserDefaults standardUserDefaults];
To store a value in the settings object, you use code like this:
[settings setObject:@"City" forKey:@"sortField"];
This saves the value “City” with the key “sortField”. Every value must have a unique key. In addition to the setObject:forKey: method, there are also methods that can be used to store scalar values such as BOOL and int. Here’s an example: ...
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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.