The unique string that you use to identify the ride.
- iOS 10.0+
- Mac Catalyst 13.0+
- watchOS 3.2+
Use this property to store an app-specific identifier for the ride. Use this string to identify the ride in your own data structures. This string is not displayed to the user.
After the user books a ride, any status updates related to that ride must include a status object with the same identifier as the originally booked ride. Returning a status object with a different identifier causes Siri and Maps to change their UI, under the assumption that the user completed or canceled the previous ride.