Question

Which type I should use to save many objects with same key?

I should post data to server where one of parameter is suggestedTo and it contains userId.
This parameters should be more then one. So I’m confused which data type I should use to save them.
For example array or dictionary should looks like

{
  @"suggestedTo" = 111,
  @"suggestedTo" = 222,
  @"suggestedTo" = 333,
  etc.
}

Answer 1

This is typically handled with a dictionary of sets (or arrays if the data is ordered). So in this case, you’d have something like:

NSSet *suggestedTo = [NSSet setWithObjects:[NSNumber numberWithInt:111],
                                           [NSNumber numberWithInt:222],
                                           [NSNumber numberWithInt:333], nil];
NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:suggestedTo,
                                                                @"suggestedTo", nil];