Reactnative react native ：navigationOptions 中的标题样式不起作用

我是个新来的本地人.我正在try 为我的应用程序设置一些全局标题样式，但它不起作用

route.js

import React, { Component } from 'react';
import { View } from 'react-native';
import { createStackNavigator, createAppContainer } from "react-navigation";
import SplashScreen from '../screens/SplashScreen';
import CalendarScreeen from '../screens/CalendarScreen';

const NavStack = createStackNavigator(
    {
        Splash: {
            screen: SplashScreen,
            navigationOptions: {
                header: null
            },
        },
        Calendar: {
            screen: CalendarScreeen,
            navigationOptions: {
                title: 'Calendar',
            },
        },
    },
    {
        initialRouteName: 'Calendar',
        navigationOptions: {
            headerStyle: {
                backgroundColor: '#28F1A6',
                elevation: 0,
                shadowOpacity: 0
            },
            headerTintColor: '#333333',
            headerTitleStyle: {
                fontWeight: 'bold',
                color: '#ffffff'
            }
        }
       
    }

);

const Routes = createAppContainer(NavStack);
export default Routes;

现在，我意识到我可以在我的类组件中做类似的事情

static navigationOptions = {
  title: 'Chat',
  headerStyle: { backgroundColor: 'red' },
  headerTitleStyle: { color: 'green' },
}

正如这里提到的possible alternative

但我想从route.js岁开始实现同样的目标

我也试过defaultNavigationOptions，就像docs中提到的那样

但是没有运气！！