title: QLPreviewController missing navigation bar in SwiftUI
body: <p>QLPreviewController navigation bar missing when I presented in sheet. 
  It looks like this : <a href="https://i.stack.imgur.com/JpKBc.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/JpKBc.jpg" alt="Image"></a> 
  How can I show up top navigation bar or navigationItem?</p>
  
  <p>QuickLookController UIKit representable in swiftUI</p>
  
  <pre><code>.sheet(isPresented: $showQuickLook, onDismiss: {self.showQuickLook = false}) {
                          if  self.selectedURL != nil {
                              QuickLookController(url: self.selectedURL!) {
                                  self.showQuickLook = false
                              }.edgesIgnoringSafeArea(.all)
                          }
                      }
  
  
  struct QuickLookController: UIViewControllerRepresentable {
  
      var url: URL
      var onDismiss: () -&gt; Void
  
      func makeCoordinator() -&gt; Coordinator {
          Coordinator(self)
      }
  
      func updateUIViewController(_ uiViewController: QLPreviewController, context: UIViewControllerRepresentableContext&lt;QuickLookController&gt;) {
          uiViewController.reloadData()
      }
  
      func makeUIViewController(context: Context) -&gt; QLPreviewController {
          let controller = QLPreviewController()
  
          controller.dataSource = context.coordinator
          controller.reloadData()
          return controller
      }
  
      class Coordinator: NSObject, QLPreviewControllerDataSource {
          var parent: QuickLookController
  
          init(_ qlPreviewController: QuickLookController) {
              self.parent = qlPreviewController
              super.init()
          }
          func numberOfPreviewItems(in controller: QLPreviewController) -&gt; Int {
              return 1
          }
          func previewController(_ controller: QLPreviewController, previewItemAt index: Int) -&gt; QLPreviewItem {
              return self.parent.url as QLPreviewItem
          }
  
      }
  }
  </code></pre>