In the Xcode project folder (real on my hard drive) there is a folder "Classes-1.moved-aside" in the "Classes" folder. It contains several files that are also in the Classes folder. What is the point in this folder "Classes 1. Placed aside"?
This is for classes that you are out of date. One way to get them is to create a new class with the same name of another class, xcode will move the old class to the moved folder.