title: Ionic/Angular alternative to $stateChangeStart
body: <p>I was wondering if there is an alternative to</p>
  
  <pre><code>$rootScope.$on("$stateChangeStart", function() {});
  </code></pre>
  
  <p>Because I want to get that event on many pages which do different things. If I use the way above, this event is fired for every page I implemented it (even if the page wasn't where I came from or wasn't where I go to)...which is a little overheading.</p>
  
  <p>So what I am looking for is an event which is fired only if the controller is used on the current page.</p>