My app is mostly implemented in UIKit. Will AppIntents work with UIKit? If so, which (scene or app) delegate method gets called to start the intent?
Yes. Here's a sample code project that implements AppIntents with UIKit: https://developer.apple.com/documentation/sirikit/soup_chef_with_app_intents_migrating_custom_intents
At runtime, the system calls the perform() method of your AppIntent.
