iOS Programming: The Big Nerd Ranch Guide, 6th Edition

23 Core Data Relationships

Core Data is not that exciting with just one entity. Much of the power behind Core Data comes to light when there are multiple entities that are related to one another, because Core Data manages relationships between entities.

In this chapter, you are going to add tags to the photos in Photorama with labels such as “Nature,” “Electronics,” or “Selfies.” Users will be able to add one or more tags to photos and also create their own custom tags (Figure 23.1).

Figure 23.1  Final Photorama application

Relationships

One of the benefits of using Core Data is that entities can be related ...