使用react-native-router-flux，我如何让选项卡栏单击指定要切换到哪个选项卡？

npm install react-native-router-flux --save

import { Router, Scene, TabBar } from 'react-native-router-flux';

const TabIcon = ({ selected, title }) => {
  return (
    <Text style={{ color: selected ? 'red' : 'black' }}>{title}</Text>
  );
};

const App = () => {
  return (
    <Router>
      <Scene key="root">
        <Scene
          key="tabbar"
          tabs
          tabBarStyle={{ backgroundColor: '#FFFFFF' }}
        >
          <Scene
            key="tab1"
            title="Tab 1"
            icon={TabIcon}
            component={Tab1Component}
          />
          <Scene
            key="tab2"
            title="Tab 2"
            icon={TabIcon}
            component={Tab2Component}
          />
          <Scene
            key="tab3"
            title="Tab 3"
            icon={TabIcon}
            component={Tab3Component}
          />
        </Scene>
      </Scene>
    </Router>
  );
};

AppRegistry.registerComponent('YourApp', () => App);