pub unsafe static kMDQueryProgressNotification: Option<&'static CFString>Available on crate feature
MDQuery only.Expand description
The name of the notification sent to indicate changes to the query’s results list during the initial gathering phase of a query’s execution. Mostly adds will occur during this phase, but removals and changes can also occur, as in any update. This info dictionary parameter of the notification can carry the kMDQueryUpdateChangedItems and kMDQueryUpdateRemovedItems keys. Note that these keys may be have empty arrays for values, or be missing, if there are no changes of that particular type. For performance reasons, added results are not indicated in progress notifications (to avoid the cost of creating the result objects). These notifications are sent out by a query before the kMDQueryDidFinishNotification.
See also Apple’s documentation