iOS: Setup notification for keyboard disappearing

KeyboardDisappears.swift

        // shifts the view up for space for the keyboard
        NotificationCenter.default.addObserver(forName: NSNotification.Name.UIKeyboardWillHide, object: nil, queue: nil) {
            
            notification in
            
            print("\(notification.description)")

            // move back to original position
            self.view.frame.origin.y = 0
        }