什么是我的Classes目录中的“Classes-1.moved-aside”目录？

In the XCode project folder (the real one on my hard drive) there's a "Classes-1.moved-aside" folder inside the "Classes" folder. It contains a few files which are also in the "Classes" folder. What's the point of that "Classes-1.moved-aside" folder?In the XCode project folder (the real one on my