addressBook
Optional. The address book database that the person record is added to.
Declaration
var addressBook: ABAddressBook? { get set }Discussion
When unspecified, this view controller sets the value of this property by creating an ABAddressBookRef object.
The person record is only added to the address book database if allowsAddingToAddressBook is true and the user taps the “Add to Existing Contact” or “Create New Contact” button.