SwiftUI隐藏UIKit UINavigationController的导航栏(rootViewController : _)

Question

我有一个 SwiftUI View :

struct Content View: View {
  var body: some View {
    Text("Content view")
  }
}

我使用了用 UIKit 创建的菜单。我的 View 应该是 UIViewController 或 UINavigationController。为了显示我的 swiftUI View ，我在 UINavigationController 中设置了我的 View :

let navigationController = UIHostingController(rootView: Content()).inNavigation()

// inNavigation()
extension UIViewController{
    func inNavigation() -> UIViewController {
        let vc = self
        let navigationController = UINavigationController(rootViewController: self)
        vc.navigationController?.navigationBar.isHidden = true
        vc.navigationController?.setNavigationBarHidden(true, animated: true)
        vc.navigationController?.isNavigationBarHidden = true
        vc.navigationController?.isToolbarHidden = true
        vc.navigationController?.setToolbarHidden(true, animated: true)
        vc.navigationController?.accessibilityFrame = .zero
        
        navigationController.navigationController?.navigationBar.isHidden = true
        navigationController.navigationController?.setNavigationBarHidden(true, animated: true)
        navigationController.navigationController?.isNavigationBarHidden = true
        navigationController.navigationController?.isToolbarHidden = true
        navigationController.navigationController?.setToolbarHidden(true, animated: true)
        navigationController.accessibilityFrame = .zero
        return navigationController
    }
}

我试图隐藏导航栏。但它仍然显示:

Answer 1

UINavigationController 应该在 View 层次结构中才能生效。

这里是工作变体，假设您将它注入(inject) SceneDelegate 中的窗口(使用 Xcode 11.4/iOS 13.4 测试)

extension UIViewController{
    func inNavigation() -> UIViewController {
        let navigationController = UINavigationController(rootViewController: self)
        DispatchQueue.main.async {
            navigationController.isNavigationBarHidden = true
        }
        return navigationController
    }
}