---
title: anchorUpdates
framework: arkit
role: symbol
role_heading: Instance Property
path: arkit/worldtrackingprovider/anchorupdates
---

# anchorUpdates

A sequence of updates to anchors a provider tracks.

## Declaration

```swift
final var anchorUpdates: AnchorUpdateSequence<WorldAnchor> { get }
```

## Discussion

Discussion An async sequence providing all anchor updates. The provider vends new or updated world anchors via the sequence as they become available. Identify the anchors you want to react to by calling id. note: The provider also vends updates for persisted world anchors from previous runs of the app onto the sequence as soon as the world tracking provider is running. World anchors persist across device restarts until you explicitly remove them.

## See Also

### Tracking objects

- [init()](arkit/worldtrackingprovider/init().md)
- [requiredAuthorizations](arkit/worldtrackingprovider/requiredauthorizations.md)
- [isSupported](arkit/worldtrackingprovider/issupported.md)
- [allAnchors](arkit/worldtrackingprovider/allanchors.md)
- [addAnchor(_:)](arkit/worldtrackingprovider/addanchor(_:).md)
- [WorldTrackingProvider.Error](arkit/worldtrackingprovider/error.md)