Chapter 11. Basic Core Data

At this point, you’ve implemented an application that keeps track of an array of objects, takes care of undo, and handles saving and loading from a file. As you can imagine, there are an awful lot of applications like the one you just wrote.

Apple decided to make this type of application extremely easy to write:

• NSArrayController will hold on to an array of objects.

• Bindings will eliminate much of the glue code that would be necessary to keep the model objects in sync with the views.

• NSManagedObjectContext will observe the instance variables of your data objects and will take care of undo for you and loading and saving the data.

So, the punchline is: Using Core Data and bindings, the RaiseMan application that you have written can be created with no code at all. In this section, you are going to write a simple Core Data application (not unlike RaiseMan) that has no code.