如何在BottomTabNavigator中删除底部文本？

import { createBottomTabNavigator } from 'react-navigation-tabs';
import { createAppContainer } from 'react-navigation';
import { Text } from 'react-native';

const TabNavigator = createBottomTabNavigator({
  Screen1: {
    screen: Screen1,
    navigationOptions: {
      tabBarLabel: () => null, // 删除底部文本
      tabBarIcon: ({ focused }) => (
        <Text style={{ color: focused ? 'red' : 'black' }}>Screen1</Text>
      ),
    },
  },
  Screen2: {
    screen: Screen2,
    navigationOptions: {
      tabBarLabel: () => null, // 删除底部文本
      tabBarIcon: ({ focused }) => (
        <Text style={{ color: focused ? 'red' : 'black' }}>Screen2</Text>
      ),
    },
  },
  // 添加其他屏幕...
});

export default createAppContainer(TabNavigator);