`react-native run-ios`命令失败（PCH问题），但是在xcode中构建成功

Question

I had a react native project that was building and running perfectly fine. Then I decided to move it into a sub directory, and I started receiving lots of precompiled header errors:

PCH was compiled with module cache path '/Users/me/place1/ios/build/ModuleCache/3R9LOJFOBFZVJ', but the path is currently
  '/Users/me/place2/app/ios/build/ModuleCache/3R9LOJFOBFZVJ'

Fair enough, but what's weird is that, if I open up the xcode project and clean / rebuild in there, everything works!

Then when I close down the server started by xcode and try to launch it using react-native run-ios it continues to complain about PCH issues.

Not sure what I'm missing...

Answer 1

Sorry to answer my own, but turns out it's safe to just delete the whole build directory at /path/to/project/ios/build . After that it rebuilt fine for me :)

Answer 2

无需删除整个构建目录，只需删除/path/to/project/ios/build/ModuleCache ModuleCache文件夹，然后react-native run-ios进行操作即可。

Answer 3

您必须删除派生数据文件夹。