DrawerActions reference
DrawerActions is an object containing methods for generating actions specific to drawer-based navigators. Its methods expand upon the actions available in NavigationActions.
The following actions are supported:
- openDrawer - open the drawer
 - closeDrawer - close the drawer
 - toggleDrawer - toggle the state, ie. switch from closed to open and vice versa
 
Usage
import { DrawerActions } from 'react-navigation-drawer';
this.props.navigation.dispatch(DrawerActions.toggleDrawer())