ubiquityIdentityToken
An opaque token that represents the current user’s iCloud Drive Documents identity.
Declaration
@NSCopying var ubiquityIdentityToken: (any NSCoding & NSCopying & NSObjectProtocol)? { get }Discussion
In iCloud Drive Documents, when iCloud is available, this property contains an opaque object representing the identity of the current user. If iCloud is unavailable or there is no logged-in user, the value of this property is nil. Accessing the value of this property is relatively fast, so you can check the value at launch time from your app’s main thread.
You can use the token in this property, together with the NSUbiquityIdentityDidChange notification, to detect when the user logs in or out of iCloud and to detect changes to the active iCloud account. When the user logs in with a different iCloud account, the identity token changes, and the system posts the notification. If you stored or archived the previous token, compare that token to the newly obtained one using the isEqual(_:) method to determine if the users are the same or different.
Accessing the token in this property doesn’t connect your app to its ubiquity containers. To establish access to a ubiquity container, call the url(forUbiquityContainerIdentifier:) method. In macOS, you can instead use an NSDocument object, which establishes access automatically.
CloudKit clients should not use this token as a way to identify whether the iCloud account is logged in. Instead, use accountStatus(completionHandler:) or fetchUserRecordID(completionHandler:).