I tried to rename my project in xcode and i get linker error . Then i followed these steps : Error after renaming Xcode 6 project: "linker command failed with exit code 1 (use -v to see invocation)"
But still i was not able to remove this error. Then i renamed my project to its original one and now my run button in xcode is disabled . I got stuck ...!!!!
I have tried (for you) same and also i'm getting same error. And also renamed it as previous.
Restart Xcode and Press Command + Shift + K [clean project] or Command + Shift + Alt + K that will delete all of the products and intermediate files in the build folder.
After that try to rebuild.
Suggestions
To rename app name kindly go to Build Settings -> Product Name -> Change it to whatever you need.
