title: iOS - SKNavigationSettings zoom level configuration
body: <p>I have an issue with auto zoom during navigation. I followed the official docs but auto zoom doesn't work. Here my test code</p>
  
  <pre><code>SKSpeedInterval speed1;
  speed1.minimumSpeed = 1;
  speed1.maximumSpeed = 45;
  
  SKSpeedInterval speed2;
  speed2.minimumSpeed = 46;
  speed2.maximumSpeed = 300;
  
  SKZoomLevelConfiguration *level1 = [[SKZoomLevelConfiguration alloc] init];
  SKZoomLevelConfiguration *level2 = [[SKZoomLevelConfiguration alloc] init];
  
  level1.speedInterval = speed1;
  level2.speedInterval = speed2;
  
  level1.zoomLevel = kMaximumZoomLimit;
  level2.zoomLevel = kMaximumZoomLimit-2;
  
  SKNavigationSettings* navSettings = [SKNavigationSettings navigationSettings];
  navSettings.navigationType = SKNavigationTypeReal;
  navSettings.zoomLevelConfigurations = [NSArray arrayWithObjects:level1, level2, nil];
  
  [level1 release];
  [level2 release];
  
  [[SKRoutingService sharedInstance] startNavigationWithSettings:navSettings];
  </code></pre>
  
  <p>Have you any idea about what is going wrong?</p>