Unable to hide the navigationBar when embedding swiftUI in UIkit

Question

I am trying to hide the navigationBar when putting some swiftUI inside of a UIKit viewController as such:

override func viewWillAppear(_ animated: Bool) {
   super.viewWillAppear(animated)
   self.navigationController?.setNavigationBarHidden(true, animated: animated)

But it does not go away. When I take away the swiftUI, however it works. Does anyone know how to solve this?

Edit:

I am instantiating a view like this let controller = UIHostingController(rootView:view()) where view is the swiftUI and then adding this to the UIView() as you would any UIKit element.

Answer 1

UIHostingViewController respects the navigationBarHidden value of your SwiftUI view. You can either call .navigationBarHidden(true) at the end of your SwiftUI view, or you can use the custom UIHostingController subclass shown in the example below.

Solution:

import SwiftUI
import UIKit

class YourHostingController <Content>: UIHostingController<AnyView> where Content : View {

  public init(shouldShowNavigationBar: Bool, rootView: Content) {
      super.init(rootView: AnyView(rootView.navigationBarHidden(!shouldShowNavigationBar)))
  }

  @objc required dynamic init?(coder aDecoder: NSCoder) {
      fatalError("init(coder:) has not been implemented")
  }
}

Example of usage:

let hostVc = YourHostingController(shouldShowNavigationBar: false, rootView: YourSwiftUIView())