swift: gray color in bar

Question

I have NavigationViewController with white navigation bar color. When I go from firstViewController to secondViewController I see gray color in my navigation bar. I want to remove this gray color. How to fix it?

firstViewController :

go to secondViewController :

secondViewController :

How to remove this:

my code:

override func viewDidLoad() {
        super.viewDidLoad()

        if #available(iOS 11.0, *) {
            self.navigationController?.navigationBar.prefersLargeTitles = true
            self.navigationItem.largeTitleDisplayMode = .always
            self.navigationController?.navigationBar.shadowImage = UIImage()
            self.navigationController?.navigationBar.backgroundColor = UIColor.white
        } else {
            // Fallback on earlier versions
        }
}

Answer 1

您需要将isTranslucent属性设置为true

  self.navigationController?.navigationBar.isTranslucent = true

Answer 2

self.navigationController?.navigationBar.barTintColor = .white
self.navigationController?.navigationBar.shadowImage = image
self.navigationController?.navigationBar.setBackgroundImage(image, for: .default)