title: Update React Component after render
body: <p>I am using react-native-sortable-listview to change order of list-item by drag and drop. Only drag item is again rendered so its position is updated but other have their previous position. When This component is re-rendered by other cause like some increment button, all position are being correct.
   So my question is when my react-native-sortable-list is rendered how can I re-render this again.
   Both ways to render by <code>forceUpdate()</code> and <code>this.setState()</code> , I could not follow as I can not update state in render function.
   What can be a possible way for doing this.</p>