title: React Native : multiple Navigator navigationBar
body: <p>I'm stuck with React Native. </p>
  
  <p>I have a "Header" navigationBar, but I want to add another navigationBar to my Navigator component.</p>
  
  <pre><code>render() {
      let currentRoute = this.props.route
      return (
          &lt;Navigator
              style={styles.container}
              initialRoute={this.props.route}
              renderScene={this.router.bind(this)}
              navigationBar={&lt;Header /&gt;} // &lt;&lt; There, how can I simply add another navigationBar ?
           /&gt;
      );
  }
  </code></pre>
  
  <p>And here's the <code>&lt;Header/&gt;</code> component : </p>
  
  <pre><code>render() {
      return &lt;Navigator.NavigationBar
          style={styles.navBarContainer}
          navState={this.props.navState}
          routeMapper={routeMapper}
      /&gt;
    }
  </code></pre>
  
  <p><strong>Now, I'm trying to add a <code>&lt;Footer/&gt;</code> component, which would render a similar component as <code>&lt;Header/&gt;</code>, in order to have 2 persistent navigation bar on my app.</strong> </p>
  
  <p>How to achieve this ?</p>