Delete all iOS contacts using the Contacts.framework

delete_contacts_example.m

- (void) deleteAllContacts {
	CNContactStore *contactStore = [[CNContactStore alloc] init];

	[contactStore requestAccessForEntityType:CNEntityTypeContacts completionHandler:^(BOOL granted, NSError * _Nullable error) {
		if (granted == YES) {
			NSArray *keys = @[CNContactPhoneNumbersKey];
			NSString *containerId = contactStore.defaultContainerIdentifier;
			NSPredicate *predicate = [CNContact predicateForContactsInContainerWithIdentifier:containerId];
			NSError *error;
			NSArray *cnContacts = [contactStore unifiedContactsMatchingPredicate:predicate keysToFetch:keys error:&error];

			if (error) {
				NSLog(@"error fetching contacts %@", error);
			} else {
				CNSaveRequest *saveRequest = [[CNSaveRequest alloc] init];

				for (CNContact *contact in cnContacts) {
					[saveRequest deleteContact:[contact mutableCopy]];
				}

				[contactStore executeSaveRequest:saveRequest error:nil];
				DDLogVerbose(@"Deleted contacts %lu", cnContacts.count);
			}
		}
	}];

}

Hello, Can i know how to deleted selected contacts.