# AnchorUpdate Information about the event that updated an anchor. ``` struct AnchorUpdate where AnchorType : Anchor ``` ## Topics ### Inspecting anchor updates [`let anchor: AnchorType`](/documentation/ARKit/AnchorUpdate/anchor) The anchor that this anchor update contains information about. [`var timestamp: TimeInterval`](/documentation/ARKit/AnchorUpdate/timestamp) The time when this anchor update occurred. [`let event: AnchorUpdate.Event`](/documentation/ARKit/AnchorUpdate/event-swift.property) The event which caused the anchor to update. [`enum Event`](/documentation/ARKit/AnchorUpdate/Event-swift.enum) An event that indicates whether an anchor was added, updated, or removed. [`var description: String`](/documentation/ARKit/AnchorUpdate/description) A textual representation of this anchor update. ## Relationships ### Conforms To [`Sendable`](/documentation/Swift/Sendable) [`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible) [`SendableMetatype`](/documentation/Swift/SendableMetatype) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)