How to display default PopOVer of ios8?

Question

i am trying to show popover in ios8 using swift as

    @IBAction func showPopUP(sender: AnyObject) {

        let storyboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
        let popVC = storyboard.instantiateViewControllerWithIdentifier("pop")as! PopViewController

        popVC.modalPresentationStyle = UIModalPresentationStyle.Popover
        self.presentViewController(popVC, animated: true, completion: nil)

        var presentationController = UIPopoverPresentationController()
        presentationController.permittedArrowDirections = UIPopoverArrowDirection.Left | UIPopoverArrowDirection.Right
        presentationController.sourceView = popVC.view
        presentationController.sourceRect = popVC.view.frame

    }
}

However gives me an error as

Terminating app due to uncaught exception 'NSGenericException', reason: '-[UIPopoverController init] is not a valid initializer. You must call -[UIPopoverController initWithContentViewController:].'

What am i doing wrong here?

EDIT: i want to show popover as of the default of ios 8

Here is the link of project on GoogleDrive : https://drive.google.com/open?id=0B6dTvD1JbkgBM3F6RXhjVGFvZmM&authuser=0

Answer 1

well first of all you set the Deleagte of UIPopoverPresentationControllerDelegate to self. then implement this method as

func adaptivePresentationStyleForPresentationController(PC: UIPresentationController) -> UIModalPresentationStyle {
        return UIModalPresentationStyle.None
    }

This tells your iphone forcefully show the VC as popover.

and implement your IBAction same way as

 @IBAction func showPopUP(sender: AnyObject) {

        let storyboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)            
        let popVC = storyboard.instantiateViewControllerWithIdentifier("pop")as! PopViewController            
        popVC.modalPresentationStyle = UIModalPresentationStyle.Popover
        popVC.popoverPresentationController!.delegate = self
        let popOverController = popVC.popoverPresentationController
        popOverController!.sourceView = sender as! UIView
        popOverController!.sourceRect = sender.bounds
        popOverController?.permittedArrowDirections = .Any
        self.presentViewController(popVC, animated: true, completion: nil)


    }