The identifier associated with a user record in the Contacts database.
- iOS 10.0+
- Mac Catalyst 13.0+Beta
- watchOS 3.2+
The identifier of the
CNContact object associated with the user. The value of this property is specified automatically at initialization time and can’t be changed later.
If the user denied your app access to the Contacts database, this property is always
nil. Not having access to the user’s Contacts can prevent an intent from including data related to contacts. For example, if the user tries to book a ride home, the intent may derive information about the user’s home from the Contacts database.