Join Simon Allardice for an in-depth discussion in this video Implementing undo and redo functionality, part of Core Data for iOS and OS X.
Let's add Undo and Redo support to this Core Data Cocoa application.…Are you watching carefully? Because I'm done. You see it's already there.…Our managed object context, the collection of managed objects, our scratch pad, our…beating heart of Core Data already has an Undo Manager built right in, and it's already keeping…track of everything we're doing when we're running this application, it understands our…data model, it understands our relationships.…However, it just doesn't seem like it's working right now, because I don't have anything available…under the Edit menu, and I also don't have the Command keyboard shortcut working, but…this is very simple to interact with.…
And when we usually don't want to directly call it ourselves, I'm going to show you how…I could if I wanted to.…So I'm jumping back into the application, I'm just going to drag on a simple button…onto this interface somewhere, and say Undo, and all I'm going to do here is shift into…a system view and manually call it, so we're connecting to our AppDelegate.…
- 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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