Merge two NSDictionary in one NSDictionary ( if keyvalues are same )

Merge two NSDictionary in one NSDictionary ( if keyvalues are same )

NSMutableDictionary *combined = [your_nsdictionary mutableCopy];
    for(NSString *key in [combined allKeys])
    {
        NSString *breakfastDate = [your_nsdictionary valueForKey:key];
        NSString *dinnerDate = [your_nsdictionarytwo objectForKey:key];
        if(dinnerDate){
            [combined setObject:[NSString stringWithFormat:@"%@,%@",breakfastDate, dinnerDate] forKey:key];
            } else {
                [combined setObject:[NSString stringWithFormat:@"%@,0",breakfastDate] forKey:key];
                }
    }
    NSLog(@"Combine %@",combined);