title: React Native Child Parent communication
body: <p>Parent Child communication seems no problem using pass props:</p>
  
  <p>mainpage.ios.js code:</p>
  
  <pre><code>var OtherPage = require('./otherpage');
  &lt;OtherPage value={2}/&gt;
  </code></pre>
  
  <p>Then on otherpage.ios.js I can utilise the variable using this.props.value but then if I update the value on otherpage.ios.js how does it get communicated back to the mainpage.ios.js?</p>