React native Undefined不是函数(在“…(0,_reactNavigation.StackNavigator)…”附近)
我正在做一个关于react native的天气应用的研究项目。我正在使用react navigation v4。它给出了上述错误。请任何人帮助解决这个问题React native Undefined不是函数(在“…(0,_reactNavigation.StackNavigator)…”附近),react-native,react-navigation,stack-navigator,React Native,React Navigation,Stack Navigator,我正在做一个关于react native的天气应用的研究项目。我正在使用react navigation v4。它给出了上述错误。请任何人帮助解决这个问题 //Index.js import React from "react"; import { AppRegistry } from 'react-native'; import App from './App'; import { name as appName } from './app.json'; import { createSto
//Index.js
import React from "react";
import { AppRegistry } from 'react-native';
import App from './App';
import { name as appName } from './app.json';
import { createStore, applyMiddleware } from 'redux';
import reducer from "./reducers";
import { Provider } from 'react-redux';
import thunk from 'redux-thunk';
import { StackNavigator } from 'react-navigation';
import WeatherDetails from './screens/WeatherDetails';
import CityLists from './screens/CityLists';
const Navigation = StackNavigator({
WeatherDetails: { screen: WeatherDetails },
CityLists: { screen: CityLists }
});
const store = createStore(reducer, applyMiddleware(thunk));
const wrapper = () => {
return (
<Provider store={store}>
<Navigation />
</Provider>
);
}
AppRegistry.registerComponent(appName, () => wrapper);
如中所述,您必须单独安装StackNavigator。因此,首先安装StackNavigator:
npm安装反应导航堆栈-保存
然后从react导航堆栈导入createStackNavigator:
从“反应导航堆栈”导入{createStackNavigator};
现在,创建导航:
const Navigation=createStackNavigator{
WeatherDetails:{屏幕:WeatherDetails},
城市列表:{屏幕:城市列表}
};
我这样做了,并按照文档中提到的那样用AppContainer包装了导航。但这一次我发现了一个新的错误,AppContainer不是一个函数。我解决了这个问题,这是我的错误。createAppContainer来自react navigation。我从react导航堆栈导入了它。谢谢你的帮助。