---
title: "activate(for:)"
framework: AudioAccessoryKit
role: symbol
role_heading: Instance Method
platforms: [iOS 27.0+]
path: "audioaccessorykit/audioaccessoryheadtracking/handler/activate(for:)"
---

# activate(for:)

Called when a head-tracking session has been established with the host.

## Declaration

```swift
func activate(for session: AudioAccessoryHeadTracking.Session)
```

## Parameters

- `session`: A session object identifying the active connection.