Core Data - iOS Programming: The Big Nerd Ranch Guide - page 481

Moving Homepwner to Core Data
Your Homepwner application currently uses archiving to save and reload its data. For a
moderately sized object model (say, fewer than 1000 objects), this is fine. As your object
model gets larger, however, you will want to be able to do incremental fetches and updates,
and Core Data can do this.
The very first step is to add the Core Data framework to your project. Select the Homepwn-
er target and under Build Phases , open the Link Binary With Libraries build phase. Click
the + button to add the Core Data framework.
Figure 16.1 Add Core Data framework