AddressBok and ios5 issue

[jonasman]

I would replace the actual method implementation of + (ABAddressBookRef) addressBook;

to:

• (ABAddressBookRef) addressBook { if (shared) return shared;

  CFErrorRef errorRef;

  if (&ABAddressBookCreateWithOptions != NULL){ shared = ABAddressBookCreateWithOptions(NULL, &errorRef); } else { shared = ABAddressBookCreate(); }

  if (!shared) { NSError *error = (__bridge_transfer NSError *)errorRef; NSLog(@"Error creating new address book object: %@", error.localizedFailureReason); return nil; }

  //ABAddressBookRegisterExternalChangeCallback(shared, addressBookUpdated, NULL); return shared; }