How to determine whether contacts in iOS are duplicates or not?...

How do I set the default contacts container for my iOS app to the contacts container that is saved i...

How to integrate app with iOS Contacts app?...

Change view once contact permission is granted...

Is there a clean way to convert a CNPostalAddress to a CNMutablePostalAddress?...

How to add a contact with multiple phone value by ContactsManager(Kekiiwaa)...

How to convert CNContact to CNMutableContact?...