Learning Core Data for iOS: A Hands-On Guide to Building Core Data Applications

Attribute Settings

On the right of Figure 2.5 the Data Model Inspector is shown, which allows configuration of attribute settings beyond their type. You can access this area by pressing Option++3 when an attribute is selected. The options presented vary depending on the selected attribute’s type. Not all options are available to all attributes:

Transient properties are never written to the persistent store. Although it may seem odd to have a property that is never persisted, there are scenarios where you need a property only in the managed object ...