Unable to drag and move around files in Project Navigator in Xcode

Question

I am unable to drag my classes (and other files) around in my Project navigator (Xcode 6.1), and I am unsure of when this problem began. It might have been when I updated Xcode from 6.0 to 6.1.

I have been able to do this before and would like to be able to again, as I prefer to re-organize the structure of the project as it grows. I am also unable to create new groups since this happened. When I click "New group" I can see a new folder in the tree structure, but only for half a second before it disappears again.

Can anyone help me with this?

EDIT:

This is not an issue if a create a new project, this is only happening in this particular project I am working on.

Answer 1

I'd try out the following:

• Make sure that you don't have anything in your file filter text field at the bottom of your project navigator (https://dzwonsemrish7.cloudfront.net/items/0O0w370g173t3w303v0y/Screen%20Shot%202014-12-02%20at%2010.21.49%20AM.png?v=aa5fd288)
• Try restarting Xcode
• Try starting a new project to see if you still have the same issue. If you do, try deleting and reinstalling Xcode.