Make the custom viewcontroller cover the navigation bar - ios

Question

I am showing a custom pop up over my main viewcontroller. For this I have created a viewcontroller in the storyboard (image shown), the corresponding class being as below.
class PopUpViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = UIColor.black.withAlphaComponent(0.7)
self.showAnimate()
}
func showAnimate()
{
self.view.alpha = 1.0
}
func removeAnimate()
{
UIView.animate(withDuration: 0.0, animations: {
self.view.alpha = 0.0;
}, completion:{(finished : Bool) in
if (finished) {
self.view.removeFromSuperview()
}
});
}
}
Then in my main viewcontroller, I show this pop up on a button click as follows:
let popOverVC = UIStoryboard(name: "MainViewController", bundle: nil).instantiateViewController(withIdentifier: "popup") as! PopUpViewController
self.addChildViewController(popOverVC)
popOverVC.view.frame = self.view.bounds
self.view.addSubview(popOverVC.view)
popOverVC.didMove(toParentViewController: self)
This makes the background of the main view controller black with opacity of 70% when the pop up is added. How can I make the navigation bar also have the same background effect?
I have tried updating:
self.view.window?.backgroundColor = UIColor.black.withAlphaComponent(0.7)
and
self.navigationController?.navigationBar.backgroundColor = UIColor.black.withAlphaComponent(0.7)
in viewDidLoad() but did not work. Any possible solution?

Answer 1

If I understand it correctly, you are adding the popOverVC as a subview to the view of your mainViewController that is embedded in UINavitationController. If that is the case, then it is only logical that the popOverVC does not overlay the navigationBar, because navigationBar is a subview of the navigationController, not of your mainViewController. To be able to overlay also the navigationBar, you will have to add that popOverVC to the navigationController:
// to make things a bit easier working with the optional self.navigationController
guard let navController = self.navigationController else { return }
let popOverVC = UIStoryboard(name: "MainViewController", bundle: nil).instantiateViewController(withIdentifier: "popup") as! PopUpViewController
navController.addChildViewController(popOverVC)
popOverVC.view.frame = navController.view.bounds
navController.view.addSubview(popOverVC.view)
popOverVC.didMove(toParentViewController: navController)