NSNotificationCenter get notifications on NSMutableDictionary addObject

Question

How can I get notifications with NSNotificationCenter when object is added to NSMutableDictionary?

Also are there any notifications for immutable NSDictionary?

Answer 1

The the beauty of inheritance :)

#define kSomeDictionarySetAValue @"SomeDictionarySetAValue"

@interface SomeDictionary : NSMutableDictionary

@end

@implementation SomeDictionary

- (void) setValue:(id)value forKey:(NSString *)key
{
    [super setValue:value forKey:key];

    [[NSNotificationCenter defaultCenter] postNotificationName:kSomeDictionarySetAValue
                                                        object:self];
}

@end