I\'m just starting out in xCode 6, and I can\'t seem to figure out how to add a new swift-file to the new view controllers I add in the interface builder.
Add a new Cocoa Touch class. Choose File->New->File... from the menu. Give this new class a name such as "ViewController2" and set the Subclass of: pop down to UIViewController. The file "ViewController2.swift" will be created.
Click on your new View Controller in Interface Builder. In the Identity Inspector (on the right in Xcode) set the Custom Class for the View Controller to "ViewController2".