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

Question

我有一个SwiftUI视图：

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

我使用了使用UIKit创建的菜单。在那里，我的视图应该是UIViewController或UINavigationController。为了显示我的SwiftUI视图，我将我的视图设置在UINavigationController中：

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navigationBar，但它仍然显示：

- aturan23

Answer 1

UINavigationController 应该在视图层级中，才能起到作用。

以下是经过测试的工作变体，假设您将其注入到 SceneDelegate 中的窗口中（在 Xcode 11.4 / iOS 13.4 上测试）。

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

- Asperi