IOS9 - CNContactPickerViewController: Preselect Contacts

Question

I use the new CNContactPickerViewController to select contacts from the address book and use them in my application.

When I click the button, I call this code:

let contactPicker = CNContactPickerViewController()
        contactPicker.delegate = self
        contactPicker.predicateForEnablingContact = NSPredicate(format: "emailAddresses.@count > 0")
        presentViewController(contactPicker, animated: true, completion: nil)

And I used the following CNContactPickerDelegate method to select multiple contacts:

func contactPicker(picker: CNContactPickerViewController, didSelectContacts contacts: [CNContact]) {

    selectedRecipients = contacts.map { $0.emailAddresses.first!.value as! String }
    tableView.reloadData()

}

This helps me populate an array called "selectedRecipients" (basically the EmailAddresses string attribute)

Here is the result:

This works fine. However, if I previously selected contacts, I would like contactPicker to pre-select contacts when I initialize it, i.e. Show that contacts are already selected when they appear. Is there any way to do this?

thanks

Answer 1

, , , . "" CNContact (. CNKeyDescriptor) , , .

, , .

CNKeyDescriptor, :

// Properties that are always fetched. Can be used with key value coding and observing.
@available(iOS 9.0, *)
public let CNContactIdentifierKey: String

// Optional properties that can be fetched. Can be used with key value coding and observing.
@available(iOS 9.0, *)
public let CNContactNamePrefixKey: String
@available(iOS 9.0, *)
public let CNContactGivenNameKey: String
@available(iOS 9.0, *)
public let CNContactMiddleNameKey: String
@available(iOS 9.0, *)
public let CNContactFamilyNameKey: String
@available(iOS 9.0, *)
public let CNContactPreviousFamilyNameKey: String
@available(iOS 9.0, *)
public let CNContactNameSuffixKey: String
@available(iOS 9.0, *)
public let CNContactNicknameKey: String
@available(iOS 9.0, *)
public let CNContactPhoneticGivenNameKey: String
@available(iOS 9.0, *)
public let CNContactPhoneticMiddleNameKey: String
@available(iOS 9.0, *)
public let CNContactPhoneticFamilyNameKey: String
@available(iOS 9.0, *)
public let CNContactOrganizationNameKey: String
@available(iOS 9.0, *)
public let CNContactDepartmentNameKey: String
@available(iOS 9.0, *)
public let CNContactJobTitleKey: String
@available(iOS 9.0, *)
public let CNContactBirthdayKey: String
@available(iOS 9.0, *)
public let CNContactNonGregorianBirthdayKey: String
@available(iOS 9.0, *)
public let CNContactNoteKey: String
@available(iOS 9.0, *)
public let CNContactImageDataKey: String
@available(iOS 9.0, *)
public let CNContactThumbnailImageDataKey: String
@available(iOS 9.0, *)
public let CNContactImageDataAvailableKey: String
@available(iOS 9.0, *)
public let CNContactTypeKey: String
@available(iOS 9.0, *)
public let CNContactPhoneNumbersKey: String
@available(iOS 9.0, *)
public let CNContactEmailAddressesKey: String
@available(iOS 9.0, *)
public let CNContactPostalAddressesKey: String
@available(iOS 9.0, *)
public let CNContactDatesKey: String
@available(iOS 9.0, *)
public let CNContactUrlAddressesKey: String
@available(iOS 9.0, *)
public let CNContactRelationsKey: String
@available(iOS 9.0, *)
public let CNContactSocialProfilesKey: String
@available(iOS 9.0, *)
public let CNContactInstantMessageAddressesKey: String

Answer 2

. CNContact, , :

contactPicker.predicateForEnablingContact = [NSPredicate predicateWithFormat:@"!(identifier IN %@)", arrayOfPreviouslySelected];

, :

contactPicker.predicateForEnablingContact = [NSPredicate predicateWithFormat:@"!(identifier IN %@) && emailAddresses.@count > 0", arrayOfPreviouslySelected];