在终端terminal运行ReactNative程序经常出现的问题

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:

pod not found after install, “pod setup” returns: Could not find 'cocoapods' (>= 0) among 64 total gem(s) (Gem::LoadError)

sudo gem install cocoapods