title: React Native base fab as single button
body: <p>Hi I'm using react native and react native base and I'm trying to use a FAB as a scroll-to-top button -no other action button inside of it-. Understandibly I could use a button, but the FAB is rather simple to set up.</p>
  
  <p>I have the following code:</p>
  
  <pre><code>  &lt;Fab
      active="true"
      containerStyle={{ }}
      style={{ backgroundColor: 'rgba(0, 0, 0)' }}
      position="bottomRight"
      onPress={this.scrollToTop.bind(this)}&gt;
      &lt;Icon name="ios-arrow-up" /&gt;
    &lt;/Fab&gt;
  </code></pre>
  
  <p>When I press the FAB, not only nothing happens, anything that is "clickable" behind it gets triggered. Any ideas?</p>