什么是CoreDataGeneratedAccessors？

Question

When I created a CoreData object with a one-to-many relationships, I get some methods (CoreDataGeneratedAccessors) . Do we need to implement these methods? The methods generated automatically are given below :

- (void)addCirqitsObject:(Cirqit *)value;
- (void)removeCirqitsObject:(Cirqit *)value;
- (void)addCirqits:(NSSet *)value;
- (void)removeCirqits:(NSSet *)value;

Answer 1

You do not have to implement those methods, but you can. In the case you don't, CoreData will generate them dynamically for you.

If you want overwrite the default implementation please read the Core Data Programming Guide (Custom To-Many Relationship Accessor Methods) to find a sample implementation.

A reason to overwrite might be to trigger additional calculations or updates before or after new Cirqit objects being added or removed. But be aware of not to change the sample implementation code, just add your custom code - otherwise you might break your relationships handling.

Answer 2

You can override the core data generated accessors. You have to pay attention to a few special things like calling willChangeValueForKey and didChangeValueForKey, but other than that overriding the accessors is pretty much the same as always.

Courtesy:- https://stackoverflow.com/a/9659750/1865424

I think these links can help you..

http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/CoreData/Articles/cdAccessorMethods.html