Problems with iPhone MapKit: viewForAnnotation fails to set pinColor?

Question

I am trying to customize a map displaying different contact colors depending on the type / class of the location in question. I know this is a pretty common thing, but I'm having trouble getting a viewForAnnotation delegate to constantly update / set the color of the pin.
I have a showThisLocation function, which basically goes through the AddressAnnotations list, and then based on the annotation class (bus stop, hospital, etc.). I have installed

if( myClass == 1){
 [defaults setObject:@"1" forKey:@"currPinColor"];
 [defaults synchronize];
 NSLog(@"Should be %@!", [defaults objectForKey:@"currPinColor"]);
} else if( myClass ==2 ){
 [defaults setObject:@"2" forKey:@"currPinColor"];
 [defaults synchronize];
 NSLog(@"Should be %@!", [defaults objectForKey:@"currPinColor"]);
}
[_mapView addAnnotation:myCurrentAnnotation];

then my viewForAnnotation delegate looks like this:

- (MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation {
    if( annotation == mapView.userLocation ){ return nil; }

    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    MKPinAnnotationView *annView = nil;
    annView = (MKPinAnnotationView*)[mapView dequeueReusableAnnotationViewWithIdentifier:@"currentloc"];
    if( annView == nil ){
        annView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"currentloc"];
    }

    annView.pinColor =  [defaults integerForKey:@"currPinColor"];
    NSLog(@"Pin color: %d", [defaults integerForKey:@"currPinColor"]);
    annView.animatesDrop=TRUE;
    annView.canShowCallout = YES;
    annView.calloutOffset = CGPointMake(-5, 5);
    return annView;
}

, , NSLog "if" , , , , . , , "if", .

, NSUserDefaults , MKAnnotation, "currentPinColor", "currentPinColor", "currentPinColor" , , "currentPinColor" MKAnnotation. , ,

- (MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id <MyCustomMKAnnotation>)annotation 

- (MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation 

, MyCustomMKAnnotation .

/ MyCustomMKAnnotation, , pinColor. , .

Answer 1

. ! , MKAnnation.

,

MKPinAnnotationView: ?

Mapkit

, Cannonade,

- (MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>) annotation
{   
    // ... get the annotation delegate and allocate the MKAnnotationView (annView)
    if ([annotationDelegate.type localizedCaseInsensitiveCompare:@"NeedsBluePin"] == NSOrderedSame)
    {
        UIImage * image = [UIImage imageNamed:@"blue_pin.png"];
        UIImageView *imageView = [[[UIImageView alloc] initWithImage:image] autorelease];
        [annView addSubview:imageView];
    }
    // ...

, , , - ... . , Cannonade, ,

- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control
{
    AnnotationDelegate * delegate = (AnnotationDelegate*)view.annotation;
    // do stuff with delegate.position;
}

, , .

viewForAnnotation delegate ,

- (MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation {
    if( annotation == mapView.userLocation ){ return nil; }
    AddressAnnotation *delegate = annotation;  //THIS CAST WAS WHAT WAS MISSING!
    MKPinAnnotationView *annView = nil;
    annView = (MKPinAnnotationView*)[mapView dequeueReusableAnnotationViewWithIdentifier:@"currentloc"];
    if( annView == nil ){
        annView = [[MKPinAnnotationView alloc] initWithAnnotation:delegate reuseIdentifier:@"currentloc"];
    }

    if ([delegate.classPinColor localizedCaseInsensitiveCompare:@"green"] == NSOrderedSame) {
        annView.pinColor = MKPinAnnotationColorGreen;
    }else if ([delegate.classPinColor localizedCaseInsensitiveCompare:@"purple"] == NSOrderedSame){
        annView.pinColor = MKPinAnnotationColorPurple;
    }else if ([delegate.classPinColor localizedCaseInsensitiveCompare:@"red"] == NSOrderedSame){
        annView.pinColor = MKPinAnnotationColorRed;
    }
    annView.animatesDrop=TRUE;
    annView.canShowCallout = YES;
    annView.calloutOffset = CGPointMake(-5, 5);
    return annView;
}

, - .

!