Returns an Event Kit recurrence rule that matches the available information.
- iOS 11.0+
- Mac Catalyst 13.0+Beta
- watchOS 4.0+
The recurrence rule that matches the recurring date range, or nil if the date components range does not specify a recurring time.
If you initialized the date components range with a recurrence rule, use this method to specify that rule in a format that is accepted by Event Kit classes.