React Navigation源代码阅读 ： react-navigation.js

// 本模块本身没有实现React Navigation的任何具体功能，
// 本模块的的主要任务是将分散在各个具体功能模块文件中的功能集中导出
module.exports = {
  // Core
  get createNavigationContainer() {
    return require('./createNavigationContainer').default;
  },
  get StateUtils() {
    return require('./StateUtils').default;
  },
  get addNavigationHelpers() {
    return require('./addNavigationHelpers').default;
  },
  get NavigationActions() {
    return require('./NavigationActions').default;
  },

  // Navigators
  get createNavigator() {
    return require('./navigators/createNavigator').default;
  },
  get StackNavigator() {
    return require('./navigators/StackNavigator').default;
  },
  get SwitchNavigator() {
    return require('./navigators/SwitchNavigator').default;
  },
  get TabNavigator() {
    return require('./navigators/TabNavigator').default;
  },
  get DrawerNavigator() {
    return require('./navigators/DrawerNavigator').default;
  },

  // Routers
  get StackRouter() {
    return require('./routers/StackRouter').default;
  },
  get TabRouter() {
    return require('./routers/TabRouter').default;
  },
  get SwitchRouter() {
    return require('./routers/SwitchRouter').default;
  },

  // Views
  get Transitioner() {
    return require('./views/Transitioner').default;
  },
  get CardStackTransitioner() {
    return require('./views/CardStack/CardStackTransitioner').default;
  },
  get CardStack() {
    return require('./views/CardStack/CardStack').default;
  },
  get Card() {
    return require('./views/CardStack/Card').default;
  },
  get SafeAreaView() {
    return require('react-native-safe-area-view').default;
  },

  // Header
  get Header() {
    return require('./views/Header/Header').default;
  },
  get HeaderTitle() {
    return require('./views/Header/HeaderTitle').default;
  },
  get HeaderBackButton() {
    return require('./views/Header/HeaderBackButton').default;
  },

  // DrawerView
  get DrawerView() {
    return require('./views/Drawer/DrawerView').default;
  },
  get DrawerItems() {
    return require('./views/Drawer/DrawerNavigatorItems').default;
  },

  // TabView
  get TabView() {
    return require('./views/TabView/TabView').default;
  },
  get TabBarTop() {
    return require('./views/TabView/TabBarTop').default;
  },
  get TabBarBottom() {
    return require('./views/TabView/TabBarBottom').default;
  },

  // SwitchView
  get SwitchView() {
    return require('./views/SwitchView/SwitchView').default;
  },

  // HOCs
  get withNavigation() {
    return require('./views/withNavigation').default;
  },
  get withNavigationFocus() {
    return require('./views/withNavigationFocus').default;
  },
};