Delegates

This page documents callback contracts between WorkoutKit and host app code.

DocC symbol source is available at:

`WorkoutKitInterface`

WorkoutKitInterface is the core host lifecycle protocol implemented by WorkoutKit controllers.

Method	Contract
`saveSession(state: SaveWorkoutState)`	Persist session results in host backend/app logic. Call `super` in controller overrides.
`displayPostWorkout() -> AnyPublisher<Void, Never>`	Return publisher that completes when post-workout flow is done.
`quitWorkout()`	Handle quit-without-save flow. Call `super` and ensure handling of non-UI-thread invocations.

GoModeController and GoVideoController both provide default implementations for this protocol.

WorkoutKitLogInterface provides host-level logging and tracking hooks.

Method	Contract
`log(_ message: String, context: [String: AnyHashable]?)`	Receives debug log messages and optional metadata context.
`trackEvent(_ event: Tracking.Event, properties: [Tracking.Property: String]?)`	Receives structured analytics events emitted by WorkoutKit.

This protocol covers business callbacks specific to regular workouts.

Method	Contract
`getAllRecommendations() -> AnyPublisher<Data, Never>`	Called when recommendations must be fetched by host logic.
`buyPremiumContent(from: UIViewController?) -> AnyPublisher<Data, Never>`	Called when premium content purchase flow is requested.

RemoteManagerDelegate defines callbacks from remote media clients toward the workout controller.

High-signal callbacks include: