Join Simon Allardice for an in-depth discussion in this video Understanding the managed object context, part of Core Data for iOS and OS X.
The Managed Object Context is a vital object in Core Data.…It is the beating heart of Core Data.…The Managed Object Context sits in the middle of everything.…It's not necessarily the most complex object, but it is the most connected, the one that drives everything.…It's the conductor conducting the orchestra, it's the engine of Core Data.…Now earlier, I said that one of the benefits of Core Data is that we don't have to traverse…through all our objects, for the ones we want to save or at least calling save on every single one.…
What we do is we take our entire group of related managed objects or object graph and say save.…Well, how we group them is the Managed Object Context, it's a specific type NSManagedObjectContext…that you have available when you link to Core Data.…We put all our managed objects inside this context, and we call save on it.…Because in Core Data, an individual managed object just by itself doesn't have a save method.…A Managed Object Context does, and that's why when we create a new individual…
- Understanding Core Data and object persistence frameworks
- Creating a Core Data project
- Exploring data modeling
- Creating entities, attributes, and relationships
- Creating managed objects
- Fetching in Core Data
- Implementing undo and redo support
- Creating a Core Data Cocoa app without code
- Responding to validation issues
- Converting store types
- Preloading default data
Skill Level Intermediate
Q: In the CoursesViewController.m file, I receive a message that the method dismissModalViewControllerAnimated is no longer supported by Apple. Is there a newer method to use?
A: You may have received the warning that a call to the dismissModalViewControllerAnimated: method is now deprecated.
This is a recently deprecated method, so the code _will_ continue to work using that call, but to remove the warning, change the code from:
to the current recommended version:
[self dismissViewControllerAnimated:YES completion:nil];
It should take care of that message.
1. Getting Started
2. Modeling in Core Data
3. Saving in Core Data
Creating managed objects12m 46s
4. Fetching in Core Data
Using predicates9m 32s
5. Putting It Together: iOS
6. Putting It Together: Cocoa
7. Store Types and Model Changes
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