fix react-native @expo problem with create-react-native-app

初始化项目时的问题

• $ create-react-native-app AwesomeProject

• 通过上面的命令出现下面的错误：

  [1/4]   Resolving packages...
  warning react-native-scripts > xdl > auth0 > rest-facade > superagent-proxy > proxy-agent > socks-proxy-agent > socks@1.1.1
  0: If using 2.x branch, please upgrade to at least 2.1.6 to avoid a serious bug with socket data flow and an import issue i
  ntroduced in 2.1.0
  [2/4]   Fetching packages...
  info @expo/ngrok-bin-freebsd-x64@2.2.8: The platform "darwin" is incompatible with this module.
  info "@expo/ngrok-bin-freebsd-x64@2.2.8" is an optional dependency and failed compatibility check. Excluding it from instal
  lation.
  info @expo/ngrok-bin-linux-arm@2.2.8: The platform "darwin" is incompatible with this module.
  info "@expo/ngrok-bin-linux-arm@2.2.8" is an optional dependency and failed compatibility check. Excluding it from installa
  tion.
  info @expo/ngrok-bin-linux-arm@2.2.8: The CPU architecture "x64" is incompatible with this module.
  info @expo/ngrok-bin-linux-ia32@2.2.8: The platform "darwin" is incompatible with this module.
  info "@expo/ngrok-bin-linux-ia32@2.2.8" is an optional dependency and failed compatibility check. Excluding it from install
  ation.
  info @expo/ngrok-bin-linux-ia32@2.2.8: The CPU architecture "x64" is incompatible with this module.
  info @expo/ngrok-bin-freebsd-ia32@2.2.8: The platform "darwin" is incompatible with this module.
  info "@expo/ngrok-bin-freebsd-ia32@2.2.8" is an optional dependency and failed compatibility check. Excluding it from insta
  llation.
  info @expo/ngrok-bin-freebsd-ia32@2.2.8: The CPU architecture "x64" is incompatible with this module.
  info @expo/ngrok-bin-linux-x64@2.2.8: The platform "darwin" is incompatible with this module.
  info "@expo/ngrok-bin-linux-x64@2.2.8" is an optional dependency and failed compatibility check. Excluding it from installation.
  info @expo/ngrok-bin-sunos-x64@2.2.8: The platform "darwin" is incompatible with this module.
  info "@expo/ngrok-bin-sunos-x64@2.2.8" is an optional dependency and failed compatibility check. Excluding it from installation.
  info @expo/ngrok-bin-win32-x64@2.2.8-beta.1: The platform "darwin" is incompatible with this module.
  info "@expo/ngrok-bin-win32-x64@2.2.8-beta.1" is an optional dependency and failed compatibility check. Excluding it from installation.
  info @expo/ngrok-bin-win32-ia32@2.2.8-beta.1: The platform "darwin" is incompatible with this module.
  info "@expo/ngrok-bin-win32-ia32@2.2.8-beta.1" is an optional dependency and failed compatibility check. Excluding it frominstallation.
  info @expo/ngrok-bin-win32-ia32@2.2.8-beta.1: The CPU architecture "x64" is incompatible with this module.
  info @expo/ngrok-bin-darwin-ia32@2.2.8: The CPU architecture "x64" is incompatible with this module.
  info "@expo/ngrok-bin-darwin-ia32@2.2.8" is an optional dependency and failed compatibility check. Excluding it from installation.
  info @expo/ngrok-bin-linux-arm64@2.2.8: The platform "darwin" is incompatible with this module.
  info "@expo/ngrok-bin-linux-arm64@2.2.8" is an optional dependency and failed compatibility check. Excluding it from installation.
  info @expo/ngrok-bin-linux-arm64@2.2.8: The CPU architecture "x64" is incompatible with this module.
  

解决方案

方案1 ：

https://github.com/react-community/create-react-native-app/blob/master/EJECTING.md

• $ npm run eject

方案2：

• 重新初始化项目使用 react-native init <yourAppName> 来代替 create-react-native-app <yourAppName>

参考链接：

• https://github.com/react-community/create-react-native-app/issues/311
• https://github.com/react-community/create-react-native-app/blob/master/EJECTING.md
• https://stackoverflow.com/questions/44270504/react-native-ios-and-android-folders-not-present?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa

第一开始遇到这个问题，走了很多弯路，后来通过观察项目中无 ios 和 android 文件夹，再次通过谷歌搜索，获得答案！