How to manually add Core Data to project?

E.g. what "Use Core Data for storage" checkbo开发者_开发百科x option means when creating new Window or Navigation based project?

How to add Core Data for Tab Bar Application?

How to initialize managedObjectModel, managedObjectContext, persistentStoreCoordinator?

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Easiest way is to create a temp project with core data turned on and then copy the methods from the AppDelegate to your existing project. In addition you will need to create a model file and import the CoreData framework.

Those are the only differences that checkmark creates.