title: help with multiple images for mapkit annotations
body: <p>Very new to xcode and somewhat confused. I was able to use a custom image for annotation - works fine. Problem is that I want to do is have a different images for each of the annotations. What should I add/change to the code below? Thanks in advance and remember, I'm a newbee!</p>
  
  <pre><code>#import "MapViewController.h"
  
  @interface AddressAnnotation : NSObject&lt;MKAnnotation&gt; {
  CLLocationCoordinate2D coordinate;
  NSString *mTitle;
  NSString *mSubTitle;
  UIImage *image;
  
  }
  
  @property (nonatomic, retain) UIImage *image;
  
  @end
  
  @implementation AddressAnnotation
  
  
  @synthesize coordinate;
  @synthesize image;
  
  
  - (NSString *)subtitle{
  return mSubTitle;
  }
  
  - (NSString *)title{
  return mTitle;
  }
  
  
  -(id)initWithCoordinate:(CLLocationCoordinate2D) c Title: (NSString *)title SubTitle: (NSString *) subTitle{
  coordinate=c;
  mTitle = [title retain];
  mSubTitle = [subTitle retain];
  NSLog(@"%f,%f",c.latitude,c.longitude);
  return self;
  }
  -(void) dealloc{
  [super dealloc];
  [mTitle release];
  [mSubTitle release];
  }
  @end
  
  @implementation MapViewController
  
  // The designated initializer.  Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad.
  /*
   - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
   self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
   if (self) {
   // Custom initialization.
   }
   return self;
   }
   */
  
  
  // Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
  - (void)viewDidLoad {
  [super viewDidLoad];
  
  
  //------ To Set center of the map ------
  CLLocationCoordinate2D center;
  center.latitude = 37.83792;
  center.longitude = -122.247865;
  MKCoordinateRegion region;
  MKCoordinateSpan span;
  span.latitudeDelta = 0.05;
  span.longitudeDelta = 0.05;
  region.center = center;
  region.span = span;
  [mapView setRegion:region animated:YES];
  
  //------ To Add a point of interest ------
  CLLocationCoordinate2D c1;
  // Point one
  c1.latitude = 37.8393624;
  c1.longitude = -122.2436549;
  AddressAnnotation* ad1 = [[AddressAnnotation alloc] initWithCoordinate:c1 Title:@"title here" SubTitle:@"subtitle here"];
  ad1.image = [UIImage imageNamed:@"img01.png"];
  [mapView addAnnotation:ad1];
  [ad1 release];
  // Point two
  c1.latitude = 37.835964;
  c1.longitude = -122.250538;
  AddressAnnotation* ad2 = [[AddressAnnotation alloc] initWithCoordinate:c1 Title:@"title here" SubTitle:@"subtitle here"];
  ad2.image = [UIImage imageNamed:@"img02.png"];
  [mapView addAnnotation:ad2];
  [ad2 release];
  // Point three
  c1.latitude = 37.8317039;
  c1.longitude = -122.2454169;
  AddressAnnotation* ad3 = [[AddressAnnotation alloc] initWithCoordinate:c1 Title:@"title here" SubTitle:@"subtitle here"];
  ad3.image = [UIImage imageNamed:@"img03.png"];
  [mapView addAnnotation:ad3];
  [ad3 release];
  
  //----------------------------------------
  }
  
  - (MKAnnotationView *)mapView:(MKMapView *)theMapView viewForAnnotation:(id &lt;MKAnnotation&gt;)annotation
  {
  if ([annotation isKindOfClass:[AddressAnnotation class]])
  {
      static NSString *AnnotationIdentifier = @"AnnotationIdentifier";
      MKPinAnnotationView *pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationIdentifier];
      if (!pinView)
      {
          pinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:AnnotationIdentifier] autorelease];
          pinView.canShowCallout = YES;
          pinView.animatesDrop = YES;
      }
      else
      {
          pinView.annotation = annotation;
      }
  
      UIImageView *leftCalloutView = [[UIImageView alloc] 
                                      initWithImage:((AddressAnnotation *)annotation).image];
      pinView.leftCalloutAccessoryView = leftCalloutView;
      [leftCalloutView release];
  
      return pinView;
  }
  
  return nil;
  }
  /*
   // Override to allow orientations other than the default portrait orientation.
    - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
   // Return YES for supported orientations.
   return (interfaceOrientation == UIInterfaceOrientationPortrait);
   }
   */
  
   - (void)didReceiveMemoryWarning {
      // Releases the view if it doesn't have a superview.
  [super didReceiveMemoryWarning];
  
    // Release any cached data, images, etc. that aren't in use.
    }
  
  - (void)viewDidUnload {
  [super viewDidUnload];
  // Release any retained subviews of the main view.
  // e.g. self.myOutlet = nil;
  }
  
  
  - (void)dealloc {
  [super dealloc];
  }
  @end
  </code></pre>