How to pass parameters to a popover view controller inside a navigation controller

Question

I have an iPad app with splitview and a right bar button in the navigation bar of the detailviewcontroller.

This button calls a popover constituted of a navigation c

Answer 1

All the credit belongs to @Michael Kernahan, but as long as he don't post it as an answer I'll write it as a follow up for people looking for the same answer.

In my case the problem was that I am assigning the destination controller which is the navigation controller

popoverFirstTVC = segue.destinationViewController; 

what I should do is to access the topViewController of that navigation controller.

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if([[segue identifier] isEqualToString:@"popoverButtonSegue"]){
        MyPopoverFirstTableViewController *popoverFirstTVC = (MyPopoverFirstTableViewController *)((UINavigationController *) segue.destinationViewController).topViewController;

        popoverFirstTVC.property1 = aProperty1;
        popoverFirstTVC.property2 = aProperty2;
}