You don’t have permission to write to the folder that the file “UIGeometry.h” is in.

In Xcode, I may have used the Xcode fix function(with some suggestion) on some code and changed the "UIGeometry.h" unexpectedly.

Now I can't close the Xcode and it just popup "You don’t have permission to write to the folder that the file “UIGeometry.h” is in."

And every time I run app with Xcode, it also pops up the message, and says "You can duplicate this document and edit the duplicate. Only the duplicate will include your changes."

Any advise?