distinction between user annotation an other annotations

please i have recently made a Map which suppose to show the user location (green pin color) and others annotations for service stations (red pins color), for the moment, i am able to show all annotations with the same color and i still unable to开发者_StackOverflow社区 tell the MKMapView delegate how to make difference between two pin types and so assign to each type the right title to show. this is my MKAnnotationView method :

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

    static NSString *identifier = @"MyLocation";   
    if ([annotation isKindOfClass:[MyLocation class]]) {

        MKPinAnnotationView *annotationView = (MKPinAnnotationView *) [map dequeueReusableAnnotationViewWithIdentifier:identifier];
        if (annotationView == nil) {
            annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
        } else {
            annotationView.annotation = annotation;
        }

        annotationView.enabled = YES;
        [annotationView setAnimatesDrop:YES];
        annotationView.canShowCallout = YES;

               return annotationView;
    }

    return nil;    
}

and for my class which implement the MKAnnotation delegate i have this method :

-(id)initWithName:(NSString *)enseigneDeLaStation distanceVersLaStation:(NSString *) distanceVersLaStation coordinate:(CLLocationCoordinate2D)coordinate
{
    if ((self = [super init])) {
        _enseigneDeLaStation = [enseigneDeLaStation copy];
        _distanceVersLaStation = [distanceVersLaStation copy];
        _coordinate = coordinate;
    }
    return self;
}

thx in advance for your help :)

EDIT i try to make the user location annotation like this, please if i am wrong correct me :

location2D = (CLLocationCoordinate2D){ .latitude = latitudeOfUserLocation, .longitude = longitudeOfUserLocation };
    MyLocation *annotation=[[[MyLocation alloc]initWithName:@"You are here" distanceVersLaStation:@"" coordinate:location2D]autorelease];
    [mapView addAnnotation:annotation];

EDIT 2 Hi again, i try to make one annotation to make sure it even call the annotation method so imake this simple example :

latitudeOfUserLocation=43.2923;
    longitudeOfUserLocation=5.45427;
    location2D = (CLLocationCoordinate2D){ .latitude = latitudeOfUserLocation, .longitude = longitudeOfUserLocation };
    MyLocation *annotation=[[[MyLocation alloc]initWithName:@"You are here" distanceVersLaStation:@"coucou" coordinate:location2D]autorelease];
    [mapView addAnnotation:annotation];

    MKCoordinateSpan span={latitudeDelta:1,longitudeDelta:0.5};
    MKCoordinateRegion region={location2D,span};
    [mapView setRegion:region];

when i run the app, i see the region zoomed well which go with the 43.2923/5.45427 but i don't see the annotation, why it's not calling the annotation method,i can't move on since it's not showing the user annotation, please help, thx in advance :)

EDIT 3 Hi, i assumed that this has always relation with making difference between user and station pins, so i have declared a var codeColor, set it to 1 (the type of the user) when invoking the annotations and set it to 2(station type) when calling the annotations for the stations :

-(void)viewWillAppear:(BOOL)animated
{  
       codeColor=1;//it's the first type, the user one
    MyLocation *annotation=[[[MyLocation alloc]initWithName:@"You are right here"   distanceVersLaStation:@"" coordinate:location2D]autorelease];
    annotation.pinColor = MKPinAnnotationColorGreen;  
    [mapView addAnnotation:annotation];

}

and :

-(void)requestFinished:(ASIHTTPRequest *)request
{  codeColor=2;
    [MBProgressHUD hideHUDForView:self.view animated:YES];
    MyLocation *annotation=[[[MyLocation alloc]initWithName:ensStation distanceVersLaStation:distance coordinate:location2D]autorelease];
           annotation.pinColor = MKPinAnnotationColorPurple;  
           [mapView addAnnotation:annotation];


           }

and for the annotations method :

if (codeColor==2) {

            annotationView.rightCalloutAccessoryView=[UIButton buttonWithType:UIButtonTypeDetailDisclosure];

        }

now when testing for the first time, all is ok, the user annotation without button and the station one is with the button, but when i move from the view and i came back, all annotations are with buttons, even the user one. could you please help me there, thx in advance :)

One simple way is to add a pinColor property to your MyLocation class:

@property (nonatomic, assign) MKPinAnnotationColor pinColor;

When creating the annotation, set the pinColor:

MyLocation *annotation=[[[MyLocation alloc]initWithName:@"You are here" distanceVersLaStation:@"" coordinate:location2D]autorelease];
annotation.pinColor = MKPinAnnotationColorGreen;  //or red or whatever
[mapView addAnnotation:annotation];

and in the viewForAnnotation method:

//...
annotationView.canShowCallout = YES;
annotationView.pinColor = ((MyLocation *)annotation).pinColor;