title: Need a delegate that returns me the next advice in textual form
body: <p>I am looking for a delegate method that gets triggered when there's a new advice (like "turn left now") and that returns me that advice in a textual form. I found the <code>didChangeAdviceID</code> delegate method in  the <code>SKNavigationDelegate</code> but when I test it with;</p>
  
  <pre><code>navSettings.navigationType = SKNavigationTypeSimulation;
  </code></pre>
  
  <p>it gets triggered one time with <code>advice changed: -1</code> and that's it.</p>
  
  <p>Also when I try to get the collection of all calculated advices with:</p>
  
  <pre><code>NSArray *adviceList = [[SKRoutingService sharedInstance] routeAdviceListWithDistanceFormat:SKDistanceFormatMetric];
  for (SKRouteAdvice *advice in adviceList) {
      NSLog(@"%d: %@", [advice adviceID], [advice adviceInstruction]);
  }
  </code></pre>
  
  <p>so that I can get the current advice by calling the index I don't get anything in the <code>adviceInstruction</code> property. It's simply empty. The id however is displayed properly (there's like 20 entries for my testing route).</p>