Flutter - iOS Native Side Navigation Controller - swift

Question

In my Flutter project, my goal was to redirect to iOS native side and I have done this. After landing on iOS native side, from flutter view controller (A), I can go to view controller (B). After this I decided to add a navigation controller on this page (B) so I Embed in that view controller (B) in a navigation controller but the navigation doesn't showed up after I was in view controller (B).
StoryBoard Image
AppDelegate Page Code
What I did so far is:
1 - Embed in Flutter view controller (A) in a navigation controller [output was: Didn't found flutter view controller when I first run the app]
2 - In AppDelegate, I did change the NavigationBarHidden to false and it starts show every where in the app.
self.navigationController.setNavigationBarHidden(false, animated: false)

Answer 1

I think NavigationBar have shown. While it's backgroundColor is nil.
Since UINavigationController is a native controller, it is easy to debug its view hierarchy.
The left side is its simulator. The background is the Xcode debugger.
Here is my case solved:
#UIApplicationMain
#objc class AppDelegate: FlutterAppDelegate {
override func application(
_ application: UIApplication,
didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
) -> Bool {
GeneratedPluginRegistrant.register(with: self)
if let ctrl = window.rootViewController as? FlutterBinaryMessenger{
let methodChannel = FlutterMethodChannel(name: "_PageMineState", binaryMessenger: ctrl)
methodChannel.setMethodCallHandler { call, handler in
switch call.method{
case "pic":
if let vc = ctrl as? FlutterViewController{
let controllerOne = UIViewController()
// bar title
controllerOne.navigationControllergationItem.title = "Come"
controllerOne.view.backgroundColor = UIColor.red
let navigationController = UINavigationController(rootViewController: controllerOne)
navigationController.modalPresentationStyle = .fullScreen
// To solve it is to add:
// bar background color
navigationController.navigationControllergationBar.backgroundColor = UIColor.white
vc.present(navigationController, animated: true) { }
}
default:()
}
}
}
return super.application(application, didFinishLaunchingWithOptions: launchOptions)
}
}