title: NSNotificationCenter Swift 3.0 on keyboard show and hide
body: <p>I am trying to run a function when the keyboard shows and disappears and have the following code:</p>
  
  <pre><code>let notificationCenter = NotificationCenter.default
  notificationCenter.addObserver(self, selector: #selector(ViewController.keyBoardUp(Notification :)), name:  NSNotification.Name.UIKeyboardWillShow, object: nil)
  </code></pre>
  
  <p>And the function <code>keyBoardUp</code> below:</p>
  
  <pre><code>func keyBoardUp( Notification: NSNotification){
      print("HELLO")
  }
  </code></pre>
  
  <p>However the function doesn't print to the console when the keyboard shows. Help would be greatly appreciated</p>