title: Go to/zoom to current location function (MapKit)
body: <p>I've got a mapView which zooms to the current location using <code>viewDidLoad</code> :</p>
  
  <pre><code>#define METERS_PER_MILE 1609.344
  
  // Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
  - (void)viewDidLoad
  {
      [super viewDidLoad];
  
      mapView.showsUserLocation=TRUE;
  
      // zoom to  a specific area
      CLLocationCoordinate2D zoomLocation;
      zoomLocation.latitude = -28.994167;
      zoomLocation.longitude = 134.866944;
  
      MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(zoomLocation, 1900*METERS_PER_MILE, 1900*METERS_PER_MILE);
      MKCoordinateRegion adjustedRegion = [mapView regionThatFits:viewRegion];    
  
      // make sure the Google water mark is always visible
      mapView.autoresizingMask =
      (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight);
  
      [mapView setRegion:adjustedRegion animated:YES];        
  
      mapView.delegate=self;
  
      searchBar.delegate = self;
  }
  </code></pre>
  
  <p>This works fine. I've added a search bar and a function to jump to a specific address location. This works fine, too. I now want to add a button to jump back to the current location. Can you give me a hand, please?</p>
  
  <p>Cheers</p>