# presentedItemDidChangeUbiquityAttributes(_:) Tells your object that the file or file package’s ubiquity attributes have changed. ``` optional func presentedItemDidChangeUbiquityAttributes(_ attributes: Set) ``` ## Parameters `attributes` The set of ubiquity attributes that have changed. For information about valid ubiquity attributes, see the [`observedPresentedItemUbiquityAttributes`](/documentation/Foundation/NSFilePresenter/observedPresentedItemUbiquityAttributes) property. ## Discussion To specify the ubiquity attributes that trigger notifications, implement your file provider’s [`observedPresentedItemUbiquityAttributes`](/documentation/Foundation/NSFilePresenter/observedPresentedItemUbiquityAttributes) property. If you do not implement this property, the system sends notifications when any ubiquity attribute changes. > Note: > Changes to the ubiquity attributes don’t typically align with ``doc://com.apple.foundation/documentation/Foundation/NSFilePresenter/presentedItemDidChange()`` notifications. ## See Also [`- itemAtURL:didChangeUbiquityAttributes:`](/documentation/Foundation/NSFileCoordinator/item(at:didChangeUbiquityAttributes:)) Tells observing file providers that the item’s ubiquity attributes have changed. --- 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)