title: Distance to a location while user is in motion
body: <p>I'm in the process of writing an application that shows the user's distance from a fixed point as the user walks around (i.e. the label showing the distance from the user to the point is updated every time the user moves). I use a CLLocationManager with the code shown below:</p>
  
  <pre><code>- (void)viewDidLoad
  {
      locationManager=[[CLLocationManager alloc]init]; 
      locationManager.distanceFilter = kCLDistanceFilterNone;
      locationManager.desiredAccuracy = kCLLocationAccuracyBest; 
      [locationManager startUpdatingLocation];      
  }
  
  -(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation      *)newLocation fromLocation:(CLLocation *)oldLocation 
  {   
      CLLocationDistance meters = [newLocation distanceFromLocation:fixedPoint];
      self.distanceLabel.text = [[NSString alloc] initWithFormat:@"Distance: %.1f feet", meters*3.2808399];
  }
  </code></pre>
  
  <p>The label that is supposed to show the distance from the user to the point isn't updated constantly and when it is updated, it doesn't usually show the correct distance from the user to the fixed point. I was wondering if there is a better way for me to try and do this, or do the fundamental limitations of the core location framework make this impossible. Any help will be greatly appreciated.</p>