React-native Cannot find module 'invariant'

之前本来React-Native项目用的好好的，结果手贱更新了一下React-native版本，然后各种运行不了。不过本来就是刚开始的DEMO，所以打算重新新建一个项目React-native init {project} 来重新运行。
可是再也不能生成项目了，一直报

module.js:339    throw err;    ^Error: Cannot find module 'invariant'    at Function.Module._resolveFilename (module.js:337:15)    at Function.Module._load (module.js:287:25)    at Module.require (module.js:366:17)    at require (module.js:385:17)    at Object.<anonymous> (/Users/hoyn/Documents/WorkPlace/test1/node_modules/react-native/packager/react-packager/src/node-haste/Module.js:18:19)    at Module._compile (module.js:435:26)    at loader (/Users/hoyn/Documents/WorkPlace/test1/node_modules/react-native/node_modules/babel-register/lib/node.js:144:5)    at Object.require.extensions.(anonymous function) [as .js] (/Users/hoyn/Documents/WorkPlace/test1/node_modules/react-native/node_modules/babel-register/lib/node.js:154:7)    at Module.load (module.js:356:32)    at Function.Module._load (module.js:311:12)

在各种试验+无限回滚版本之后发现，并没什么卵用。于是打算卸掉npm，node，nvm之后重装。

如何卸载大家可以在百度查找，我是MAC可能会有些不一样。

卸载干净之后，安装nvm

curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.32.1/install.sh | bash

我在重装的时候恰好遇到nvm服务器出现问题，我还以为是我自己的问题，安装了一个下午，后面放弃了，第二天早上来花了1分钟就装好了。如果有遇到这种情况，还是去网上下载一个离线的手动安装吧。

然后安装node

npm install  -g v4.2.3 

再接着装react-native-cli
如果没有安装cnpm，记得先安装cnpm

sudo npm install cnpm -g

有安装的话跳过上一步，直接

cnpm install -g react-native-cli@0.1.10 -g

我就是傻傻分不清楚react-native-cli和react-native，之前更新了一下react-native导致工程整体不能用了。

装好之后，此时react-native init {project}依然报这个错误。
查了一下Github 和 Stack Overflow ，上面说的是需要更新npm 到3以上 ， 此时我的npm版本是2.14.7，这个我猜测跟react-native-cli的版本有关，我这个版本是不需要的。

在更新npm之前我记得有一个n模块可以更新，所以我继续装n模块

npm install -g n

在更新npm模块之前我最后尝试了一次生成react-native 项目。
奇迹发生了 ，居然让我跑通了。不我知道n模块是不是关键，但是可能会解决一些问题，这也算是react-native的爬坑之路吧。

最后附上爬坑之路：

➜  WorkPlace react-native init test1This will walk you through creating a new React Native project in /Users/hoyn/Documents/WorkPlace/test1Installing react-native package from npm...module.js:339    throw err;    ^Error: Cannot find module 'invariant'    at Function.Module._resolveFilename (module.js:337:15)    at Function.Module._load (module.js:287:25)    at Module.require (module.js:366:17)    at require (module.js:385:17)    at Object.<anonymous> (/Users/hoyn/Documents/WorkPlace/test1/node_modules/react-native/packager/react-packager/src/node-haste/Module.js:18:19)    at Module._compile (module.js:435:26)    at loader (/Users/hoyn/Documents/WorkPlace/test1/node_modules/react-native/node_modules/babel-register/lib/node.js:144:5)    at Object.require.extensions.(anonymous function) [as .js] (/Users/hoyn/Documents/WorkPlace/test1/node_modules/react-native/node_modules/babel-register/lib/node.js:154:7)    at Module.load (module.js:356:32)    at Function.Module._load (module.js:311:12)➜  WorkPlace npm install invariant warning --savewarning@3.0.0 node_modules/warning└── loose-envify@1.3.0 (js-tokens@2.0.0)invariant@2.2.2 node_modules/invariant└── loose-envify@1.3.0 (js-tokens@2.0.0)➜  WorkPlace node -vv4.2.3➜  WorkPlace npm -v2.14.7➜  WorkPlace n v3zsh: command not found: n➜  WorkPlace nzsh: command not found: n➜  WorkPlace npm install -g n/Users/hoyn/.nvm/versions/node/v4.2.3/bin/n -> /Users/hoyn/.nvm/versions/node/v4.2.3/lib/node_modules/n/bin/nn@2.1.4 /Users/hoyn/.nvm/versions/node/v4.2.3/lib/node_modules/n➜  WorkPlace react-native init test2This will walk you through creating a new React Native project in /Users/hoyn/Documents/WorkPlace/test2Installing react-native package from npm...Setting up new React Native app in /Users/hoyn/Documents/WorkPlace/test2Installing React...Installing Jest...npm WARN deprecated minimatch@2.0.10: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issuenpm WARN deprecated lodash.assign@4.2.0: This package is deprecated. Use Object.assign.To run your app on iOS:   react-native run-ios   - or -   Open ios/test2.xcodeproj in Xcode   Hit the Run buttonTo run your app on Android:   Have an Android emulator running (quickest way to get started), or a device connected   react-native run-android