April 2015
Intermediate to advanced
556 pages
17h 47m
English
book
Cocoa Programming for OS X: The Big Nerd Ranch Guide
by Aaron Hillegass, Adam Preble, Nate Chandler
Content preview from Cocoa Programming for OS X: The Big Nerd Ranch Guide
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Fetching Objects from the NSManagedObjectContext
While this chapter’s exercise demonstrates the power of bindings combined with Core Data, it is not uncommon to use Core Data programmatically.
In order to fetch objects from the NSManagedObjectContext you will first need to create an NSFetchRequest. A fetch has a number of similarities to NSArrayController, except that it is typically only used once, while an array controller is continuously updated.
At a minimum you will need the name of the entity you want to fetch. Without anything more, the fetch request will return all of the objects for that entity name. You will usually want to filter and order the results, however. For that you will provide an NSPredicate and/or an ...
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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.