I am using the xcode 4.02 for iPhone programming. In the new interface builder, when I click a button (or any other GUI-element) and go to the \"attributes inspector\" it says \
Does it work if you click the GUI element after making the attributes inspector visible?
Do you open the inspector window by clicking the 3 button in the views group? Once you do that the attribute inspector is shown on the left and you can now open the nib files and select any gui element.
There seems to be a bug in Attributes Inspector in Xcode 4. When this happens to me I usually do this:
The Attributes Inspector will magically show in the new tab.
I just had to close the assistant editor and the debug area and then it magically showed up. If you don't have the assistant editor open then all you need to do is open it, then close it again. That should fix it too.
If you don't know what the assistant editor is I have highlighted it in red:
Xcode 7.2