Command /usr/bin/codesign failed with exit code 1

Question

I have the following error:

Command /usr/bin/codesign failed with exit code 1

Here is what I already did for trying to fix this:

Answer 1

Try finding out the details of this error in the "Build Results" view where the error is shown. On the right side of the line with the error message there is an icon with several lines. This will show you some helpful details.

This way I found out for me it was a duplicate iPhone developer certificate in my keychain - one of which had been expired. Maybe search for "iphone" in your keychain (select "All Items" category first).