does EKEventEditViewController not support being pushed to a NavController? See code & error attached - iphone

Question

does EKEventEditViewController not support being pushed to a NavController? See code & error attached.
I can present the EKEventEditViewController modally fine, BUT when I try to push via the nav controller I get the following error:
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Pushing a navigation controller is not supported'
Code is:
EKEventEditViewController *addController = [[[EKEventEditViewController alloc] initWithNibName:nil bundle:nil] autorelease];
addController.eventStore = self.eventStore;
addController.editViewDelegate = self;
[self.navigationController pushViewController:addController animated:TRUE]; // ERROR HERE

Answer 1

EKEventEditViewController is subclass of UINavigationController, so it can't be pushed to another UINavigationController.
EKEventEditViewController should be presented modally.
EKEventEditViewController Class Ref

Answer 2

In case you're looking for some code to jumpstart an iPad-with-popover implementation:
EKEventStore *eventStore [[EKEventStore alloc] init];
EKEventEditViewController *eventController = [[EKEventEditViewController alloc] init];
eventController.editViewDelegate = self;
eventController.eventStore = eventStore;
EKEvent *event = [EKEvent eventWithEventStore: eventStore];
event.title = #"New Event";
event.startDate = [[NSDate alloc] init];
event.endDate = [[NSDate alloc] initWithTimeInterval: 60 * 60 sinceDate: event.startDate];
eventController.event = event;
/* You can add EKEventEditViewController directly to the popover -- this had me baffled for _hours_ */
popover = [[UIPopoverController alloc] initWithContentViewController: eventController];
You will also want to include this delegate method to do whatever you need to when the user completes or cancels event editing:
- (void) eventEditViewController: (EKEventEditViewController *)controller didCompleteWithAction: (EKEventEditViewAction)action
{
EKEvent *thisEvent = controller.event;
switch (action) {
case EKEventEditViewActionCanceled:
NSLog(#"Canceled action");
break;
case EKEventEditViewActionSaved:
NSLog(#"Saved action: %#", thisEvent.startDate);
break;
case EKEventEditViewActionDeleted:
NSLog(#"Deleted action");
break;
default:
break;
}
[popover dismissPopoverAnimated: YES];
}
Enjoy!
Mark

Answer 3

For future readers:
EKEventEditViewController is a UINavigationController so you can just say:
EKEventEditViewController *controller = [[EKEventEditViewController alloc] init];
// Set your properties here
[self.navigationController pushViewController:controller.viewControllers[0] animated:YES];
This works for me, but I don't know if you can do this for Apple.