Accidentally deleted file in Xcode

I accidentally had one of my files selected in a project in Xcode and pushed delete and it was deleted. Anyone know how to recover it? It won't let me undo. Please help.

Are permanently deleted files recoverable?

When a file is permanently deleted from the Recycle Bin, it still resides on the hard drive until it's overwritten with new data. Therefore, a data recovery tool can be used to restore some or all of the data.

The file itself is not deleted, it is simply removed from the Project Navigator. To add it back, go to File -> Add files to "projectName" and select the missing file, after having navigated to the project's folder if needed. Or simply hit cmd+z