const BusyIndicator = require('react-native-busy-indicator');

const YourComponent = React.createClass({
  render() {
    return (
      <View>
        ...
        <BusyIndicator />
      </View>
    );
  }

const loaderHandler = require('react-native-busy-indicator/LoaderHandler');

loaderHandler.showLoader("Loading"); // Show indicator with message 'Loading'
loaderHandler.showLoader("Loading More"); // Show indicator with message 'Loading More'

loaderHandler.hideLoader();  // Hide the loader