react-native – undefined不是对象(评估’RootComponent.prototype’)

---------index.js--------

import { AppRegistry } from 'react-native';
import Navigate from './Navigate';

AppRegistry.registerComponent('form1', () => Navigate);

----Navigate.js-----

import React from 'react';
import { StackNavigator, DrawerNavigator } from 'react-navigation';
import TabsList from './TabsList';

export const StackTab1 = StackNavigator({
    TabList: { screen: TabsList},
});

export const Navigate =  DrawerNavigator(
    {
       Tab1: { screen : StackTab1 },
       Tab2: { screen : StackTab1 },
       Tab3: { screen : StackTab1 }
    });

每当我尝试运行我的Android模拟器时,我都会收到该错误.安装了所有模块,除了出现在我的模拟器中的错误外,我的IDE中不会抛出任何错误.

图片下面的错误：

使用

import { Navigate } from './Navigate';

代替

import Navigate from './Navigate';