title: React Navigation Header change with screen
body: <p>I have a StackNavigation and want a default <code>Header</code> (component Header) and want that "deep pages" shows up with the default header generated for the React Navigation.</p>
  
  <p>In my index page <code>**Index**</code>, just wanted the Header component(first header)...but shows up another blank header:</p>
  
  <p><a href="https://i.stack.imgur.com/UpdXW.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/UpdXW.jpg" alt="enter image description here"></a></p>
  
  <p>In my "deep page" <code>**Teste**</code> just want the title and back button autogenarated by RNav(second header)...but the first header shows up.</p>
  
  <p><a href="https://i.stack.imgur.com/nuRor.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/nuRor.jpg" alt="enter image description here"></a></p>
  
  <p>This is my nav config:</p>
  
  <pre><code>const RootNavigator = StackNavigator({
      Welcome: {screen: Welcome},
      User: {
          screen: TabNavigator({
              Clientes: {
                  screen: StackNavigator({
                      Index: {screen: Clientes},
                      Teste: {
                          screen: Teste,
                          header: undefined
                      }
                  }, {
                      header: null,
                      navigationOptions: {
                          tabBarIcon: () =&gt; (
                              &lt;Icon name="list-alt" size={22} color="#ffffff" /&gt;
                          )
                      }
                  })
              },
              Opcoes: { screen: Opcoes }
          }, {
              tabBarPosition: 'bottom',
              tabBarOptions: {
                  showLabel: false,
                  activeTintColor: '#fff',
                  showIcon: true,
                  inactiveTintColor: '#ccc',
                  indicatorStyle: {
                      backgroundColor: '#ccc'
                  },
                  style: {
                      backgroundColor: '#536878'
                  }
              }
          })
      },
  }, {
      initialRouteName: 'User',
      navigationOptions: {
          header: props =&gt; &lt;Header {...props} /&gt;
      }
  });
  
  export default RootNavigator;
  </code></pre>