Due to some reason some of files were locked in xcode, which i resolved through the this solution.
but even after that i keep getting this error
****The file “project.pbxproj” could not be unlocked.**
Could not add write permission to the file because you do not own it. Try modifying the permissions of the file in the Finder or Terminal.**
I have also tried unlocking it through above method and it is not working, also i'm not even able to close the project and when i force close it, next time all the previous changes are gone.
Permission problem Try