How to Fetch All Contacts Record in iOS 9 Using Contacts Framework

How to fetch all contacts record in iOS 9 using Contacts Framework

Both other answers do only load contacts from the container with the defaultContainerIdentifier. In a scenario, where the user has more than one container (i.e. an Exchange and an iCloud account which both are used to store contacts), this would only load the contacts from the account that is configured as the default. Therefore, it would not load all contacts as requested by the author of the question.

What you'll probably want to do instead is getting all the containers and iterate over them to extract all contacts from each of them. The following code snippet is an example of how we do it in one of our apps (in Swift):

lazy var contacts: [CNContact] = {
    let contactStore = CNContactStore()
    let keysToFetch = [
        CNContactFormatter.descriptorForRequiredKeysForStyle(.FullName),
        CNContactEmailAddressesKey,
        CNContactPhoneNumbersKey,
        CNContactImageDataAvailableKey,
        CNContactThumbnailImageDataKey]

    // Get all the containers
    var allContainers: [CNContainer] = []
    do {
        allContainers = try contactStore.containersMatchingPredicate(nil)
    } catch {
        print("Error fetching containers")
    }

    var results: [CNContact] = []

    // Iterate all containers and append their contacts to our results array
    for container in allContainers {
        let fetchPredicate = CNContact.predicateForContactsInContainerWithIdentifier(container.identifier)

        do {
            let containerResults = try contactStore.unifiedContactsMatchingPredicate(fetchPredicate, keysToFetch: keysToFetch)
            results.appendContentsOf(containerResults)
        } catch {
            print("Error fetching results for container")
        }
    }

    return results
}()

Get a list of all contacts on iOS

Perhaps ABPerson function ABAddressBookCopyArrayOfAllPeople might do?

Example:

ABAddressBookRef addressBook = ABAddressBookCreate( );
CFArrayRef allPeople = ABAddressBookCopyArrayOfAllPeople( addressBook );
CFIndex nPeople = ABAddressBookGetPersonCount( addressBook );

for ( int i = 0; i < nPeople; i++ )
{
    ABRecordRef ref = CFArrayGetValueAtIndex( allPeople, i );
    ...
}

CNContact Frame work not fetching all contacts(iCloud,Gmail)

If you simply wish to get all unified contacts (Contacts in different accounts that represent the same person may be automatically linked together. Linked contacts are displayed in macOS and iOS apps as unified contacts) the best solution would be below one

 -(void)fetchContacts
  {
      CNContactStore *store = [[CNContactStore alloc] init];    
      [store requestAccessForEntityType:CNEntityTypeContacts completionHandler:^(BOOL granted, NSError * _Nullable error) {
      if (granted == YES)
      {
        //keys with fetching properties
        NSArray *keys = @[CNContactFamilyNameKey, CNContactGivenNameKey, CNContactPhoneNumbersKey, CNContactImageDataKey,CNContactEmailAddressesKey];
        NSString *containerId = store.defaultContainerIdentifier;
        NSArray * contactContainerArray =  [store containersMatchingPredicate:nil error:nil];
        CNContactFetchRequest * fetchRequest = [[CNContactFetchRequest alloc]initWithKeysToFetch:keys];
        [store enumerateContactsWithFetchRequest:fetchRequest error:nil usingBlock:^(CNContact * _Nonnull contact, BOOL * _Nonnull stop) {

        }];
      }
  }

How to delete record in iPhone address book using CONTACTS Framework ios 9?

The complete AddressBook Framework was deprecated in iOS9, you should check out the Contacts Framework instead:
Contacts Framework

A nice tutorial explaining deleting records here.

The tutorial covers Swift, but the same principle applys to Objective-C as well.

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