---
title: CMHeadphoneActivityManager.ActivityHandler
framework: coremotion
role: symbol
role_heading: Type Alias
path: coremotion/cmheadphoneactivitymanager/activityhandler
---

# CMHeadphoneActivityManager.ActivityHandler

The type for a handler to be invoked when headphone motion activity data is available.

## Declaration

```swift
typealias ActivityHandler = (CMMotionActivity?, (any Error)?) -> Void
```

## See Also

### Supporting Types

- [CMHeadphoneActivityManager.Status](coremotion/cmheadphoneactivitymanager/status.md)
- [CMHeadphoneActivityManager.StatusHandler](coremotion/cmheadphoneactivitymanager/statushandler.md)