如何不影响当前路由并直接更改NavigationBarRouteMapper的“标题”-- React Native？

import { NavigationActions } from 'react-navigation';

componentDidMount() {
  const { state, setParams } = this.props.navigation;
  const routes = state.routes;
  const currentRoute = routes[routes.length - 1];
  const updatedRoute = {
    ...currentRoute,
    params: {
      ...currentRoute.params,
      title: '新标题'
    }
  };
  const action = NavigationActions.setParams({ key: currentRoute.key, params: updatedRoute.params });
  setParams(updatedRoute.params);
  this.props.navigation.dispatch(action);
}

render() {
  return (
    <View>
      <Text>{this.state.title}</Text>
      {/* 其他组件内容 */}
    </View>
  );
}