Created
May ’24
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Product > Clear All Issues
will remove them.
I've investigated this issue frequently since it first in Xcode appeared 5 years ago, and the only way I've found to actually fix the issue is to run this in Terminal:
rm -rf ${HOME}/Library/Developer/Xcode/DerivedData
That will permanently get rid of the phantom warnings and errors you're seeing. However, you'll have to run this again each time new warnings and errors appear.
The other downside is that after deleting the DerivedData
folder, you'll have to do a full rebuild of your project, which can be time consuming.
The suggested solution, using Product > Clear All Issues
, only removes the warnings and errors temporarily. They will usually return the next time you build your project.
I'd like to the known the answer to this also. I end up deleting DerivedData 5 to 10 times per day on a a large project. Often I get corrupted database error, but just rebuilding again seems to fix it.