Updates the event’s data with the current information in the Calendar database.
- iOS 4.0+
- macOS 10.8+
- watchOS 2.0+
If the event was successfully refreshed,
You should call this method only on events that your application is editing, and only when your application receives the
EKEvent notification. If this method returns
false, the event has been deleted or otherwise invalidated, and you should not continue to use it.
This method does not replace the values of any properties that you have modified.