---
title: ar_world_anchor_sharing_availability_update_handler_function_t
framework: arkit
role: symbol
role_heading: Type Alias
path: arkit/ar_world_anchor_sharing_availability_update_handler_function_t
---

# ar_world_anchor_sharing_availability_update_handler_function_t

Function pointer called when there is a change in world anchor sharing availability.

## Declaration

```occ
typedef void (*)(void *, ar_world_anchor_sharing_availability_t) ar_world_anchor_sharing_availability_update_handler_function_t;
```

## Parameters

- `context`: The application-defined context.
- `sharing_availability`: World anchor sharing availability.

## See Also

### World tracking

- [ar_world_anchor_create_with_origin_from_anchor_transform](arkit/ar_world_anchor_create_with_origin_from_anchor_transform.md)
- [ar_world_anchor_is_shared_with_nearby_participants](arkit/ar_world_anchor_is_shared_with_nearby_participants.md)
- [ar_world_anchor_shared_with_nearby_participants_create](arkit/ar_world_anchor_shared_with_nearby_participants_create.md)
- [ar_world_anchor_sharing_availability_update_handler_t](arkit/ar_world_anchor_sharing_availability_update_handler_t.md)
- [ar_world_tracking_add_anchor_completion_handler_t](arkit/ar_world_tracking_add_anchor_completion_handler_t.md)
- [ar_world_tracking_remove_anchor_completion_handler_t](arkit/ar_world_tracking_remove_anchor_completion_handler_t.md)
- [ar_world_tracking_remove_all_anchors_completion_handler_function_t](arkit/ar_world_tracking_remove_all_anchors_completion_handler_function_t.md)
- [ar_world_tracking_remove_all_anchors_completion_handler_t](arkit/ar_world_tracking_remove_all_anchors_completion_handler_t.md)
- [ar_world_tracking_anchor_update_handler_t](arkit/ar_world_tracking_anchor_update_handler_t.md)
- [ar_world_tracking_configuration_create](arkit/ar_world_tracking_configuration_create.md)
- [ar_world_anchors_enumerate_anchors](arkit/ar_world_anchors_enumerate_anchors.md)
- [ar_world_anchors_enumerate_anchors_f](arkit/ar_world_anchors_enumerate_anchors_f.md)
- [ar_world_anchors_get_count](arkit/ar_world_anchors_get_count.md)
- [ar_world_tracking_provider_create](arkit/ar_world_tracking_provider_create.md)
- [ar_world_tracking_provider_is_supported](arkit/ar_world_tracking_provider_is_supported.md)