UINavigationController 状态栏颜色是透明的[重复]

Question

我想弄清楚如何使用 UINavigationController。每当我创建一个，并将 UIViewController 设置为 rootViewController 时，它将 UIViewController 的背景颜色显示为状态栏的颜色，如下所示：

UIViewController .backgroundColor 设置为 System Teal Color，Navigation Bar .background 颜色为 UIColor.gray。所以根视图控制器通过状态栏区域的导航栏显示。如何使状态栏与导航栏颜色相同？为什么那个区域是透明的？

这是主视图控制器类，其中包含 UINavigationController 作为子级。

class ViewController: UIViewController {
let navVC: UINavigationController?
var mainVC: UIViewController?

required init?(coder: NSCoder) {
    mainVC = MainVC(nibName: "MainVC", bundle: nil)
    mainVC?.title = "Main"
    navVC = UINavigationController(rootViewController: mainVC!)
    navVC?.navigationBar.backgroundColor = UIColor.gray
    
    super.init(coder: coder)
}

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.
    navVC?.willMove(toParent: self)
    self.addChild(navVC!)
    self.view.addSubview(navVC!.view)
    navVC?.didMove(toParent: self)
    
    navVC?.view.translatesAutoresizingMaskIntoConstraints = false
    navVC?.view.topAnchor.constraint(equalTo: self.view.topAnchor).isActive = true
    navVC?.view.leadingAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.leadingAnchor).isActive = true
    navVC?.view.bottomAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.bottomAnchor).isActive = true
    navVC?.view.trailingAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.trailingAnchor).isActive = true
    
}

}

这是本示例的项目。 Example Project

Answer 1

感谢 lazarevzubov，他建议 this answer. 设置 navigationBar.standardAppearance 和 navigationBar.scrollEdgeAppearance 解决了问题。