How to show the share button in Mountain Lion?

Question

Mountain Lion offers a built-in sharing button that reveals a menu of sharing services appropriate for the app:

Answer 1

In Swift, I've used this:

extension NSSharingService {
    class func shareContent ( content: [AnyObject], button: NSButton ) {
        let sharingServicePicker = NSSharingServicePicker (items: content )

        sharingServicePicker.showRelativeToRect(button.bounds, ofView: button, preferredEdge: NSRectEdge.MaxY)
    }
}