Had my share of code signing problem (esp. the enterprise distribution certificate) in my Xcode development. Luckily, stackoverflow rescued me as always. It seems a lot problem is due to the Xcode upgrade, project name change, provision profile/distribute certificate expiring etc. And the solution is usually delete or comment out the offending line. Like below. To go to the project file, I usually do in the command line, “cd projectName.xcodeproj”, then “vi project.pbxproj”.
I encountered another problem related to the provisioning profile expiration, the distribute certificate appears twice in the Keychain, even after I deleted it explicitly. It turns out the old distribute certificate came back after I opened the project in Xcode (presumedly it came back when the old provision profile associated with the project got loaded). So the workaround is to delete the old distribute certificate again after opening the project in Xcode.
Btw, saw an interesting idea from Mobile Iron regarding the enterprise distribution certificate. Normally the certificate expires in a year. In last 30 days it will prompt the user something like “the provision profile will expire in a few days…”, not good user experience. There is no way to renew it before it expires either. So the workaround suggested by MI is create 2 certificates, and create the second 6 months before the expiration and have user update the app. This way, essentially the app got extended 6 months. And so on. There is one catch in Xcode 4.3.3 I am using. It only recognizes the provision profile that was created earlier (or expires earlier). The workaround there is delete the earlier provision profile