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
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Creating Managed Objects
Managed objects can exist only in a managed object context (NSManagedObjectContext), which is Core Data’s working area. A managed object must be either created in or fetched from the managed object context. To create a new managed object, a reference to the managed object context is needed. The managed object context is available as a property on the application delegate for projects that have been set up using Xcode’s Master Detail project template. In addition, Core Data needs to know what entity the new managed object is for. Core Data has a class called NSEntityDescription that provides information about entities. Create a new instance using NSEntityDescription’s class method:
NSManagedObjectContext ...
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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.