Beginning OS X Lion Apps Development

Chapter 6

Using Core Data

Picking up where we left off in Chapter 5, we now get a glimpse of Cocoa's powerful object storage framework, Core Data, which we use to store recently entered equations so that users can retrieve and redisplay them.

At the end of this chapter, Graphique will look like Figure 6–1. It will store the recently entered equations into Core Data storage so that the equations users enter will still be present across launches of Graphique, so that users will be able to retrieve their interesting equations even after they close and reopen Graphique.

Figure 6–1. Graphique with equations in Core Data

Stepping Up to Core Data ...