title: how to pass multiple values with a notification in swift
body: <p>How to send a number and a String through a notification ...</p>
  
  <pre><code>let mynumber=1;
  let mytext="mytext";
  NSNotificationCenter.defaultCenter().postNotificationName("refresh", object: ?????????????);
  </code></pre>
  
  <p>and receive the values in the receiver ?</p>
  
  <pre><code>func refreshList(notification: NSNotification){
          let receivednumber=??????????
          let receivedString=?????????
      }
  </code></pre>