Chapter    6

Custom Managed Objects

At the moment, the Hero entity is represented by instances of the class NSManagedObject. Thanks to key-value coding, you have the ability to create entire data models without ever having to create a class specifically designed just to hold your application’s data.

This approach has some drawbacks, however. For one thing, when using key-value coding with managed objects, you use NSString constants to represent your attributes in code, but these constants are not checked in any way by the compiler. If you mistype the name of an attribute, the compiler won’t catch it. It can also be a little tedious having to use valueForKey: and setValue:forKey: all over the place instead of just using properties and dot notation. ...

Get More iPhone Development with Objective-C now with the O’Reilly learning platform.

O’Reilly members experience live online training, plus books, videos, and digital content from nearly 200 publishers.