title: hide Navigation Bar only on first page - Swift UI
body: <p>My app running on Swift UI, and my main page is <code>Home()</code>, In the home page there is <code>NavigationView</code> and <code>NavigationLink(destination: SaveThePlanet())</code>, I have hide the Navigation View on the main page "Home", its also hide in <code>SaveThePlanet()</code>.
  How can I unhide the navigation back button in the <code>SaveThePlanet()</code> page?</p>
  
  <pre><code>import SwiftUI
  
  struct Home: View {
  
      @State var show = false
      @State var showSaveThePlanet = false
      var body: some View {
          NavigationView {
              ZStack {
                  Color.gray
                  ContentView()
                      .blur(radius: show ? 10 : 0)
                      .scaleEffect(show ? 0.90 : 1)
                      .blur(radius: showSaveThePlanet ? 10 : 0)
                      .scaleEffect(showSaveThePlanet ? 0.90 : 1)
                      .animation(.default)
  
                  leftIcon(show: $show)
                      .offset(x: 0, y: showSaveThePlanet ? 300 : 70)
                      .scaleEffect(show ? 0.90 : 1)
                      .blur(radius: show ? 10 : 0)
                      .animation(.easeInOut)
  
                  SaveThePlanet()
                      .background(Color("Bg"))
                      .cornerRadius(10)
                      .shadow(color: Color("Green-Sh"), radius: 10, x: 0, y: 0)
                      .animation(.spring())
                      .offset(y: showSaveThePlanet ? 120 : UIScreen.main.bounds.height)
                      .padding()
  
                  rightIcon(show: $showSaveThePlanet)
                      .offset(x: 0, y: 70)
                      .animation(.easeInOut)
                      .scaleEffect(show ? 0.90 : 1)
                      .blur(radius: show ? 10 : 0)
                      .opacity(showSaveThePlanet ? 0 : 1)
  
  
                  rightIconClose(show: $showSaveThePlanet)
                      .offset(x: 0, y: 70)
                      .animation(.easeInOut)
                      .scaleEffect(show ? 0.90 : 1)
                      .blur(radius: show ? 10 : 0)
                      .opacity(showSaveThePlanet ? 1 : 0)
  
                  MenuView(show: $show)
              }
              .edgesIgnoringSafeArea(.all)
              .navigationBarTitle("Home")
              .navigationBarHidden(true)
              .navigationBarBackButtonHidden(false)
  
          }
      }
  }
  </code></pre>