Transparent view background turns black

Question

I want to make the view of a view controller semi-transparent. For that I have set the background color like this in the viewDidLoad method.

view.backgroundColor = UIColor(white: 0, alpha: 0.5)

When the view controller is presented, the background appears as I need it and then it turns black right away.

Why is this happening?

This is the code for showing the PopupViewController:

@IBAction func didTapShowButton(_ sender: UIButton) {
    let navController = UINavigationController(rootViewController: PopupViewController())
    present(navController, animated: true, completion: nil)
}

I uploaded a demo project here as well.

Answer 1

You may add the flag overCurrentContext (or custom), so your present might be something like:

@IBAction func didTapShowButton(_ sender: UIButton) {
    let navController = UINavigationController(rootViewController: PopupViewController())
    navController.modalPresentationStyle = .overCurrentContext
    present(navController, animated: true, completion: nil)
}