title: EKEvent edit not working
body: <p>I am working on EKEvent in iOS5. I am able to add, delete, list events but now the problem is when I try to edit an existing event, the "Done" button creates problems. It is not going inside eventEditViewController: method. What might be the problem? Any help will be appreciated. Cancel and Delete button are working. When I edit the event and click "Done", the console shows<br>
  <code>Calendar: unable to save: (null)</code> .</p>
  
  <p>Here is the code I tried..</p>
  
  <pre><code>- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
      EKEventEditViewController* eventViewController = [[EKEventEditViewController alloc] init];
      event = [self.events objectAtIndex:indexPath.row];
  
      eventViewController.event = event;
      eventViewController.editViewDelegate = self;
      [self presentModalViewController: eventViewController animated:YES];
      [eventViewController release];
  }
  
  -(void)eventEditViewController:(EKEventEditViewController *)controller
           didCompleteWithAction:(EKEventEditViewAction)action {
      EKEvent *thisEvent = controller.event;
      NSError *error;
      if ([controller.event.endDate isEqualToDate:controller.event.startDate]) {
          controller.event.endDate = [controller.event.startDate dateByAddingTimeInterval:1.0]; // add one second
      }
      switch (action) {
          case EKEventEditViewActionCancelled:
              // User tapped "cancel"
              NSLog(@"Canceled");
              break;
          case EKEventEditViewActionSaved:
              NSLog(@"Saved");
              [controller.eventStore saveEvent:controller.event span: EKSpanFutureEvents error:&amp;error];
              break;
          case EKEventEditViewActionDeleted:
              // User tapped "delete"
              NSLog(@"Deleted");
              // delete the event from event list
              [self.events removeObject:thisEvent];
              // delete the event from event store
              [self.eventStore removeEvent:thisEvent span:EKSpanThisEvent error:nil];
              // reload the tableView
              [self.tableOutlet reloadData];
              break;
          default:
                  NSLog(@"Default");
              break;
      }
  
      [self dismissModalViewControllerAnimated:YES];
  
  }
  </code></pre>