Using one of the concrete subclasses, you ask the system to generate haptics for a specific scenario and iOS manages the strength and behavior of the feedback based on the scenario you choose. In addition, you can call the prepare method of UIFeedbackGenerator to inform the system that haptic feedback is about to be required and to minimize latency. To learn how to use haptics to provide the best user experience in your app, see “Haptic Feedback” in iOS Human Interface Guidelines.

When the user makes a request involving your service, SiriKit sends your extension an intent object, which describes the user’s request and provides any data related to that request. You use the intent object to provide an appropriate response object, which includes details of how you can handle the user’s request. Siri typically handles all user interactions, but you can use an extension to provide custom UI that incorporates branding or additional information from your app.

To learn how to support SiriKit and give users new ways to access your services, read SiriKit Programming Guide. When you’re ready to implement the app extensions that handle various intents, see Intents Framework Reference and Intents UI Framework Reference.