41.11 Summary

SiriKit brings some of the power of Siri to third-party apps, allowing the functionality of an app to be accessed by the user using the Siri virtual assistant interface. Siri integration was originally only available when performing tasks that fall into narrowly defined domains such as messaging, photo searching and workouts. This has now been broadened to provide support for apps of just about any type. Siri integration uses the standard iOS extensions mechanism. The Intents Extension is responsible for interacting with Siri, while the optional UI Extension provides a way to control the appearance of any results presented to the user within the Siri environment.

All of the interaction with the user is handled by Siri, with the results structured and packaged into an intent. This intent is then passed to the intent handler of the Intents Extension via a series of method calls designed to verify that all the required information has been gathered. The intent is then...