(<UIPopoverPresentationController: 0x7fdb10687050>) should have a non-nil sourceView or barButtonItem set before the presentation occurs.'

Question

I created a navigation item button in the tab bar controller.

class TabBarContoller: UITabBarController,UIPopoverPresentationControllerDelegate {
 ...
        let languageBtn = UIBarButtonItem(title: "EN", style: UIBarButtonItemStyle.Plain, target: self, action: #selector(Language))
      // navigationItem.rightBarButtonItem = [rightButton , languageBtn]
        navigationItem.setRightBarButtonItems([rightButton,languageBtn], animated: true)

i want to run this function when this button it checked, which will popover a view controller:

 func showLanguagePopOver(base: UIView)  {
        let popOverContent = self.storyboard?.instantiateViewControllerWithIdentifier("Languages")as! Languages
        popOverContent.preferredContentSize = CGSizeMake(150, 150)
        let nav = UINavigationController(rootViewController: popOverContent)
        nav.modalPresentationStyle = .Popover
        let popOver = nav.popoverPresentationController
        popOver?.delegate = self
        popOver?.sourceView = base
        popOver?.sourceRect = base.bounds
        popOver?.sourceRect = CGRect(x: 0, y: 0, width: 100, height: 25)
        self.presentViewController(nav, animated: true, completion: nil)
    }

i tried to call it like that :

func Language()
{
  showLanguagePopOver(UIView)

  }

it didn't work, any help?

Answer 1

Change below line:

showLanguagePopOver(UIView)

with this line:

showLanguagePopOver(self.view)