How do filter on the "contactTitle" and also "contactSubtitle" about mbcontactpicker HOT 1 CLOSED

 if (self.allowsCompletionOfSelectedContacts) {
            predicate = [NSPredicate predicateWithFormat:@"contactTitle contains[cd] %@ || contactSubtitle contains[cd] %@", searchString, searchString];
        } else {
            predicate = [NSPredicate predicateWithFormat:@"(contactTitle contains[cd] %@ && !SELF IN %@) || (contactSubtitle contains[cd] %@ && !SELF IN %@)", searchString, self.contactCollectionView.selectedContacts, searchString, self.contactCollectionView.selectedContacts];
        }