React native -如何在每个屏幕上保持TabNavigator

npm install react-navigation

import { createBottomTabNavigator } from 'react-navigation-tabs';

const TabNavigatorConfig = {
  Home: {
    screen: HomeScreen,
    navigationOptions: {
      tabBarLabel: 'Home',
      tabBarIcon: ({ focused }) => (
        <Icon
          name="home"
          size={26}
          color={focused ? '#147EFB' : '#888888'}
        />
      ),
    },
  },
  Profile: {
    screen: ProfileScreen,
    navigationOptions: {
      tabBarLabel: 'Profile',
      tabBarIcon: ({ focused }) => (
        <Icon
          name="user"
          size={26}
          color={focused ? '#147EFB' : '#888888'}
        />
      ),
    },
  },
  ...
};

const TabNavigator = createBottomTabNavigator(TabNavigatorConfig);

import { createAppContainer } from 'react-navigation';

const AppContainer = createAppContainer(TabNavigator);

class App extends React.Component {
  render() {
    return <AppContainer />;
  }
}