ReactNative环境配置问题

最新推荐文章于 2019-07-08 16:08:49 发布

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最新推荐文章于 2019-07-08 16:08:49 发布

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分类专栏： RN

本文链接：https://blog.youkuaiyun.com/andanlan/article/details/51590251

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本文针对ReactNative开发过程中出现的两个典型错误进行了解析：无法读取'root'属性的空值错误及无法解析ReactDefaultPerf模块的问题，并提供了详细的解决步骤。

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文章目录

问题1 - Cannot read property 'root' of null
问题2 - Unable to resolve module ReactDefaultPerf from
参考
相关
注解

问题1 - Cannot read property ‘root’ of null

详细报错信息：

<START> fs crawl
TypeError: Cannot read property 'root' of null
    at /Users/wusuowei/Documents/WorkSpace/20160525/Demo/node_modules/react-native/packager/react-packager/src/DependencyResolver/crawlers/index.js:16:84
    at tryCallOne (/Users/wusuowei/Documents/WorkSpace/20160525/Demo/node_modules/react-native/node_modules/promise/lib/core.js:37:12)
    at /Users/wusuowei/Documents/WorkSpace/20160525/Demo/node_modules/react-native/node_modules/promise/lib/core.js:103:15
    at flush (/Users/wusuowei/Documents/WorkSpace/20160525/Demo/node_modules/react-native/node_modules/promise/node_modules/asap/raw.js:50:29)
    at doNTCallback0 (node.js:408:9)
    at process._tickCallback (node.js:337:13)

原因

watchman版本需要更新
解决

$ brew update
$ brew uninstall watchman
$ brew unlink watchman
$ brew install watchman --HEAD

注意

假如你的Homebrew安装的比较早，就有可能更新时会遇到相关的权限问题，你可以参考Homebrew简介和基本使用解决.

问题2 - Unable to resolve module ReactDefaultPerf from

详细报错信息:

Unable to resolve module ReactDefaultPerf from /Users/wusuowei/Documents/WorkSpace/20160525/Demo/node_modules/react-native/Libraries/react-native/react-native.js: Unable to find this module in its module map or any of the node_modules directories under /Users/node_modules/ReactDefaultPerf and its parent directories
```