SplitViewController Template show the popover manually?

I am using the splitViewController template provided by Apple. On a specific action, I want to show the rootViewController. Unfortunately, I cannot find a method that will show the popover (prog开发者_运维知识库rammatically) just as it does when you tap the bar button item.

Any Ideas? Thanks!

you can show the popover from a barButtonItem or with your own rect with these two methods:

[self.popoverController presentPopoverFromRect:(CGRect) inView:(UIView *) permittedArrowDirections:(UIPopoverArrowDirection) animated:(BOOL)];
[self.popoverController presentPopoverFromBarButtonItem:(UIBarButtonItem *) permittedArrowDirections:(UIPopoverArrowDirection) animated:(BOOL)]

self.popoverController is my case an ivar which stores the popover. I'm setting this variable each time in:

- splitViewController:willHideViewController:withBarButtonItem:forPopoverController:

and set it back to nil in it's counterpart method:

- splitViewController:willShowViewController:invalidatingBarButtonItem:

heres my code:

- (void)splitViewController: (UISplitViewController*)svc willHideViewController:(UIViewController *)aViewController withBarButtonItem:(UIBarButtonItem*)barButtonItem forPopoverController: (UIPopoverController*)pc {
    barButtonItem.title = @"42";
    self.navigationController.navigationBar.topItem.leftBarButtonItem = barButtonItem;
    self.popoverController = pc;
}

- (void)splitViewController: (UISplitViewController*)svc willShowViewController:(UIViewController *)aViewController invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem {
    self.navigationController.navigationBar.topItem.leftBarButtonItem = nil;
    self.popoverController = nil;
}