A notification posted when changes are made to the Calendar database.
- iOS 4.0+
- macOS 10.8+
- Mac Catalyst 13.0+
- watchOS 2.0+
This notification is posted whenever changes are made to the Calendar database, including adding, removing, and changing events or reminders. Individual changes are not described. When you receive this notification, you should refetch all
EKReminder objects you have accessed, as they are considered stale.
If you are actively editing an event and do not wish to refetch it unless it is absolutely necessary to do so, you can call the refresh method on it. If the method returns
true, you do not need to refetch the event.