Question

So I have a fetched result controller that returns a list of objects.
I am trying to detect any changes to the object including changes to sub objects

Object has these properties (NSString myString, NSSNumber myNumber, Object2 myObject2)

so any changes to myString, and myNumber would cause the FetchedResultController to notify the delegate. But changes to myObject2 properties won’t trigger the fetchedResultController to call the delegate.

Am i doing anything wrong? Am i suppose to manually let myObject know that it has to notify the fetchedResultController?

Answer 1

So here is the answer:

implement the following methods in child class (myObject2), and on every keyValue changes notify the owner class

- (void)willChangeValueForKey:(NSString *)key
{
   [super willChangeValueForKey:key];
   [self.myMainObject willChangeValueForKey:@"myObject2"];
}

- (void)didChangeValueForKey:(NSString *)key
{
   [super didChangeValueForKey:key];
   [self.myMainObject didChangeValueForKey:@"myObject2"];
}