DrawerNavigator默认为抽屉中的第一个屏幕，而不是打开抽屉

Question

我正在使用反应导航来为我的应用制作侧面菜单。我暂时使用Logoff（）方法打开菜单。我90％确信toggleDrawer（）方法正常工作。 问题：选中后，该应用默认为“设置屏幕”。它不会打开抽屉。

import MainAppNavigator from './MainAppNavigator';
import WorkingEmailScreen from '../containers/EmailScreenContainer';
import WorkingPasswordScreen from '../containers/PasswordScreenContainer';
import WorkingAuthLoadingScreen from '../containers/AuthLoadingScreenContainer';
import WorkingConfirmRegisterScreen from '../containers/ConfirmRegisterScreenContainer';
import WorkingSplashScreen from '../containers/SplashScreenContainer';
import WorkingLoginScreen from '../containers/LoginScreenContainer';
import WorkingResetPasswordScreen from '../containers/ResetPasswordScreenContainer';
import SettingsScreen from '../screens/SettingsScreen';
import SideMenuDrawer from '../screens/SideMenuDrawer';

const RegistrationStack = createStackNavigator({
  Email: WorkingEmailScreen,
  Password: WorkingPasswordScreen,
  Confirm: WorkingConfirmRegisterScreen,
});

const SettingsStack = createStackNavigator({
  Settings: SettingsScreen,
});

const SideMenuNavigator = createDrawerNavigator({
  Settings: {
    screen: SettingsStack,
    navigationOptions: {
      drawerLabel: 'Demo Screen 1',
    },
  },
  Password: {
    screen: WorkingPasswordScreen,
    navigationOptions: {
      drawerLabel: 'Demo Screen 2',
    },
  },
}, {
  contentComponent: SideMenuDrawer,
});

export default createSwitchNavigator({
  AuthLoading: WorkingAuthLoadingScreen,
  App: MainAppNavigator,
  Auth: RegistrationStack,
  Splash: WorkingSplashScreen,
  Login: WorkingLoginScreen,
  ResetPassword: WorkingResetPasswordScreen,
  SideMenu: SideMenuNavigator,
},
{
  initialRouteName: 'AuthLoading',
});

MainScreen.js

    // this.props.navigation.dispatch(DrawerActions.toggleDrawer());
    this.props.navigation.dispatch(DrawerActions.toggleDrawer())
  }