Using a non-default keychain in XCode

Question

How can I use a non-default keychain in XCode iPhone project.

I have already tried '--keychain mycerts.keychain' in 'Other Code Signing Flags' in 'Code signing' build settings.

Answer 1

After a long time of research, I concluded that it cannot be done.

Answer 2

in the Build setting under Code Signing -> Other code signing Flags, create a flag "--keychain keychain-name.keychain"

Answer 3

While inconvenient, you can temporarily change your "default Keychain" to whichever keychain has your certificate/keys. XCode will then search that keychain during code-signing. You can do this via Keychain Access.app or the security(1) command-line utility. You're responsible for unlocking said keychain yourself, however.