Problems after upgrading to Xcode 10: Build input file cannot be found

Question

I upgraded my Xcode SDK to version 10 last night and then find I cannot build.

I\'m getting this error:

Build input file cannot be found: \

Answer 1

This worked for me

1. try deleting the red colored files
2. delete the files in derived data
3. clean the build folder
4. then try building by using "new build system" from file->workspace settings