Question

I’m overriding a Core Data setter with this code:

- (void)setName:(NSString *)newName
{
    [self willChangeValueForKey:@"name"];
    [self setPrimitiveName:newName];
    [self didChangeValueForKey:@"name"];
}

It works perfectly, however I’m getting the a compiler warning:

warning: 'MyClass' may not respond to '-setPrimitiveName:newName:'

Is this correct? If so, can I suppress this warning ?
Thanks

Answer 1

Yes, that is the correct way to do it. The setPrimitiveName: method will be generated automatically by Core Data. To get rid of the warning, add a category interface at the top of your implementation file which declares primitive accessors.

// MyClass.m
@interface MyClass (CoreDataPrimitiveAccessors)

- (void)setPrimitiveName:(NSString *)newName;
- (NSString *)primitiveName;

@end

// class implementation goes here