Sample Route

sampleRoute.js

const sampleRoute = {
  renderNavBarLeft: () => (<NavBarBackButton />),
  renderNavBarTitle: () => (<SimplePageTitle />),
  renderNavBarRight: () => null,
  renderScene: () => (<SamplePage />),
};

// navigator
<Navigator
  { ...otherPropsPassingToNavigator }
  renderScene={route => route.renderScene()}
  navigationBar={
    <Navigator.NavigationBar
      routeMapper={{
        LeftButton: route => route.renderNavBarLeft(),
        RightButton: route => route.renderNavBarTitle(),
        Title: route => route.renderNavBarTitle(),
      }}
    />
  }
/>