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  "title" : "AVExperienceController.Delegate"
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# AVExperienceController.Delegate

A protocol that defines the methods to implement to respond to experience changes.

```
@MainActor protocol Delegate : AnyObject
```

## Overview

Use this delegate to be aware of transitions and to update an app’s state based on those changes.

## Topics

### Responding to experience changes

[`func experienceController(AVExperienceController, didChangeAvailableExperiences: AVExperienceController.Experiences)`](/documentation/AVKit/AVExperienceController/Delegate-swift.protocol/experienceController(_:didChangeAvailableExperiences:))

Tells the delegate when the available experiences change.

[`func experienceController(AVExperienceController, prepareForTransitionUsing: AVExperienceController.TransitionContext) async`](/documentation/AVKit/AVExperienceController/Delegate-swift.protocol/experienceController(_:prepareForTransitionUsing:))

Tells the delegate that the system is preparing for a transition.

[`func experienceController(AVExperienceController, didChangeTransitionContext: AVExperienceController.TransitionContext)`](/documentation/AVKit/AVExperienceController/Delegate-swift.protocol/experienceController(_:didChangeTransitionContext:))

Tells the delegate when the transition context changes during a transition.

[`struct TransitionContext`](/documentation/AVKit/AVExperienceController/TransitionContext)

The state of the transition that the system provides to the delegate object.


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