Code snippet from ReactNav application as featured in http://platypus.is/posts/4

addDrawerOpenButtons.js

# App.js

...
class GreenScreen extends Component {
  render() {
    return(
      ....
        <TouchableHighlight
          style={styles.button}
          onPress={() => this.props.navigation.navigate('DrawerOpen')}
        >
          <Text style={styles.text}>Open Drawer</Text>
        </TouchableHighlight>
      ...
    );
  }
}
...