bug.rb

# scannerController.rb

  def session(session, didScan:result)
    if (!result.nil?)
      if (!(@result==result))
        @result = result.copy
        @scannerSession.pause;
        
        Dispatch::Queue.main.async{ 
          @overlayController.scanner(self, resultFound:result)
        }
        
      end
    end
  end


# OverlayController.rb
def scanner(scanner, resultFound:result)                "
  @scanner = scanner

  type = result.getType
  value = result.getValue
    
  case type
  when MS_RESULT_TYPE_IMAGE
    resultStr = value
  when MS_RESULT_TYPE_EAN8
    resultStr = "EAN 8: #{value}"
  when MS_RESULT_TYPE_EAN13
    resultStr = "EAN 13: #{value}"
  when MS_RESULT_TYPE_QRCode
    resultStr = "QR Code: #{value}"
  when MS_RESULT_TYPE_DMTX
    resultStr = NSString.stringWithFormat("Datamatrix: #{value}")
  else
    resultStr = "<UNDEFINED>"
  end

  if (!@actionSheet.nil?)
    @actionSheet.dismissWithClickedButtonIndex(-1, animated:true)
    @actionSheet = nil
  end

  @actionSheet = UIActionSheet.alloc.initWithTitle(resultStr, delegate: self, cancelButtonTitle: "OK", destructiveButtonTitle: nil, otherButtonTitles: nil)
  @actionSheet.actionSheetStyle = UIActionSheetStyleBlackTranslucent
  @actionSheet.showInView(self.view)

end

# ....
# ....

def actionSheet(actionSheet, clickedButtonAtIndex:buttonIndex)
  if buttonIndex == 0 
    @scanner.resume
  end
end