Setting a Managed Object Model’s Current Version
In the project navigator, select the managed object model.
In the File inspector, locate the Versioned Data Model section.
From the Current pop-up menu, choose the name of the current model version.
Set the current version after you have created a new version of your managed object model.
To see the File inspector, make sure you select the model folder (the
xcdatamodeld file) and not a model version within the model folder.
Core Data ignores the name of the model, so you can use your own naming scheme to keep track of revision numbers.
© 2012 Apple Inc. All Rights Reserved. (Last updated: 2012-01-09)