最近使用React Native遇到一些问题,加载的时候报throwIfClosureRequired ,之前没有遇到过，百度也找不到，哪肯定就是React Native又升级之后出现的，于是在Issues中发现.奉上React Native Issues地址和throwIfClosureRequired解决方案地址

React Native Issues

1. Failed to load bundle: Cannot read property 'throwIfClosureRequired' of undefined

https://github.com/facebook/react-native/issues/18962
版本问题，安装babel-preset-react-native4.0.0的版本

"devDependencies": {
    ...
    "babel-preset-react-native": "4.0.0",
     ...
  },

2. no bundle URL present

如果npm start已经执行，并开启了服务。运行ios时还是出现以下问题，一般需要删除ios文件夹下的build文件夹。如果不能解决，欢迎提问

SUaiY.png