November 2013
Intermediate to advanced
576 pages
19h 3m
English
book
iOS Components and Frameworks: Understanding the Advanced Features of the iOS SDK
by Kyle Richter, Joe Keeley
Content preview from iOS Components and Frameworks: Understanding the Advanced Features of the iOS SDK
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Managed Object Model
Managed objects are defined in a managed object model (NSManagedObjectModel). The managed object model includes the list of entities, the attributes associated with each entity, validations associated with attributes and entities, and the relationships established between the entities. Managed object models are typically created using Xcode’s visual modeling editor (see Figure 12.1).
Figure 12.1 Xcode Data Model Editor: Graph style.
In Figure 12.1, two entities are represented. Each entity has attributes associated with it, and there is a one-to-many relationship set up between the two entities. To see more detail about the ...
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