react-navigation中navigationOptions设置的header会报错，是不是我哪里写的不对？

设置cardStack时并不会报错，header就不行了。。

代码如下：

import React, { Component } from 'react';
import {
    AppRegistry,
} from 'react-native';
import { StackNavigator } from 'react-navigation';
import home from './src/home';
import list from './src/list';

const ReactNativeDemo01 = StackNavigator(
    {
        home: {
            screen: home,
            navigationOptions: {
                title: '首页',
            }
        },
        list: {
            screen: list,
            navigationOptions: {
                title: '酒店列表'
            }
        },
    },{
        initialRouteName: 'home',
        navigationOptions: {
            header: {
                backTitle: '返回',
            }
        },
    },
);

AppRegistry.registerComponent('ReactNativeDemo01', () => ReactNativeDemo01);