observedPresentedItemUbiquityAttributes
A list of ubiquity attributes used to generate and send notifications whenever an attribute in the list changes.
Declaration
optional var observedPresentedItemUbiquityAttributes: Set<URLResourceKey> { get }Discussion
Valid attributes include the isUbiquitousItemKey attribute and any attribute whose name starts with ubiquitousItem or ubiquitousSharedItem (or NSURLUbiquitousItem or NSURLUbiquitousSharedItem in Objective-C).
If the property is not implemented, the system generates notifications for all the ubiquity attributes.
The system checks this property only when the file coordinator’s addFilePresenter(_:) method is called. Make all changes to this property before calling addFilePresenter(_:).