SwiftUI manage navigation bar visibility in navigation stack

Example.swift

import SwiftUI

final class NavBarVisibility: ObservableObject {
    @Published var isHidden: Bool

    init(isHidden: Bool) {
        self.isHidden = isHidden
    }
}

struct ContentView: View {
    var body: some View {
        NavigationView {
            A()
        }
            .environmentObject(NavBarVisibility(isHidden: false))
    }
}

struct A: View {
    @EnvironmentObject var navBarVisibility: NavBarVisibility

    var body: some View {
        VStack(spacing: 20) {
            NavigationLink(destination: B()) {
                Text("Go to screen B")
            }
            Text("Navigation bar should be hidden")
        }
            .onAppear(perform: {
                self.navBarVisibility.isHidden = true
            })
            .navigationBarTitle("A")
            .navigationBarHidden(self.navBarVisibility.isHidden)
    }
}

struct B: View {
    @EnvironmentObject var navBarVisibility: NavBarVisibility

    var body: some View {
        Text("Navigation bar should not be hidden")
            .onAppear(perform: {
                self.navBarVisibility.isHidden = false
            })
            .navigationBarTitle("B")
            .navigationBarHidden(self.navBarVisibility.isHidden)
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}