各种问题汇总：
1、Unable to resolve modules lodash （这里举例lodash，这个lodash也可以是别的。意思就是缺少当前模块，所以需要安装）
npm install lodash --save
或（制定版本的命令）： npm install lodash@3.10.1
2、babel@5.8.38 should be installed with -g
npm install babel@5.8.38 -g
3、Unable to resolve module react from ... （同1）
npm install react --save
npm install --save react@^0.14.5
4、Command `run-iOS` unrecognized. Did you mean to run this inside a react-native project?
npm install -g react-native-cli
npm install --save react-native@latest
5、Rails is not currently installed on this system.
sudo gem install rails //安装
6、终端install pod报错:
sudo gem install cocoapods