Fatal error: Malformed or Corr

Problems with xcode of different versions:

Fatal error: Malformed or specified upted ast file: 'unable to load module "/users/XXX/library/developer/xcode/deriveddata/modulecache/xyzyie6zv0op/Darwin. PCM ": file not found 'note: After modifying system headers, please delete the module cache at '/users/ME/library/developer/xcode/deriveddata/modulecache/xyzyie6zv0op '1 error generated.

After investigation, it turns out that xcode is playing tricks, and the solution is simple:

You only need to clear the inherited data folder. The specific operation is as follows: Enter the xcode window, select Organizer-> projects, select the project with the problem, and click Delete button to delete derived data.

Recompile the project.