Fetches a unified contact for the specified contact identifier.
- iOS 9.0+
- macOS 10.11+
- watchOS 2.0+
The identifier of the contact to fetch.
The properties to fetch in the returned
Error information, if an error occurred.
A unified contact matching or linked to the identifier.
Due to unification, the returned contact may have a different identifier than you specify. To fetch a batch of contacts by identifiers, use
unified. It is recommended to fetch only the properties that will be used. You can combine contact keys and contact key descriptors together.