Issue about the newest Contacts ios Framework

Question

I'm working on my app and at a certain point the user can convince their friends to download it. However, the ABAddressBook framework (link) has been deprecated with iOS 9, so I had to teach myself the newest Contacts framework (link).

However, I'm still facing issues. I have read the documentation up to this point:

NSArray *keysToFetch = @[CNContactGivenNameKey, CNContactFamilyNameKey, CNContactPhoneNumbersKey];

    NSString *containerId = [self.CN_contacts defaultContainerIdentifier];

    NSPredicate *predicate = [CNContact predicateForContactsInContainerWithIdentifier:containerId];

    self.allContacts = [self.CN_contacts unifiedContactsMatchingPredicate:predicate keysToFetch:keysToFetch error:nil];

But I know that the block of code is missing the functionality of asking the user to grant access to their contacts.

Does anyone knows a way to ask user with CNAuthorizationStatus?

Answer 1

You have to use it like this

switch CNContactStore.authorizationStatusForEntityType(CNEntityType.Contacts)
        {
            case CNAuthorizationStatus.Denied,CNAuthorizationStatus.Restricted :
             //Handle denied and restricted case
             break
            case CNAuthorizationStatus.NotDetermined :
             //Request Access
            contactsStore?.requestAccessForEntityType(CNEntityType.Contacts, completionHandler: { (granted, error) -> Void in
                //At this point an alert is provided to the user to provide access to contacts. 
                //This will get invoked if a user responds to the alert
                if  (!granted ){
                    //User has allowed the access in the alertview provided
                }
                else{
                    //User has decline the access in the alertview provided
                }
            })
             break
            case  CNAuthorizationStatus.Authorized :
             //Do your stuff

             NSArray *keysToFetch = @[CNContactGivenNameKey,CNContactFamilyNameKey, CNContactPhoneNumbersKey];
             NSString *containerId = [self.CN_contacts defaultContainerIdentifier];
             NSPredicate *predicate = [CNContact predicateForContactsInContainerWithIdentifier:containerId];
             self.allContacts = [self.CN_contacts unifiedContactsMatchingPredicate:predicate keysToFetch:keysToFetch error:nil];

             break
        }