I'm trying to know which record update in AddressBook
to modify it in my app.
Because if user have many contacts that will let the app get slower so I need to know how to get the specific one that update?
ABAddressBookRef book = ABAddressBookCreate();
ABAddressBookRegisterExternalChangeCallback(book, addressBookChanged, (__bridge void *)(self));
void addressBookChanged(ABAddressBookRef reference,
CFDictionaryRef dictionary,
void *context){}