ios – mapkit默认显示注释

但是注释在贴标签后显示,

默认情况下,如何显示注释？当我启动视图时？点击打印头.

- (MKAnnotationView *)mapView:(MKMapView *)mv viewForAnnotation:(id <MKAnnotation>)Annotation
{


    if([Annotation isKindOfClass:[MKUserLOCATIOn class]])
        return nil; 

    NSString *AnnotationIdentifier = @"PinViewAnnotation"; 

    MKPinAnnotationView *pinView = (MKPinAnnotationView *) [mapView 
                                                            dequeueReusableAnnotationViewWithIdentifier:AnnotationIdentifier];


    if (!pinView) 
    {
        pinView = [[[MKPinAnnotationView alloc] 
                    initWithAnnotation:Annotation 
                    reusEIDentifier:AnnotationIdentifier] autorelease];

        [pinView setPinColor:MKPinAnnotationColorGreen];
        pinView.animatesDrop = YES; 
        pinView.canShowCallout = YES; 

        UIImageView *houseIconView = [[UIImageView alloc] initWithImage:[UIImage imagenamed:@"tijereta.png"]];
        pinView.leftCalloutAccessoryView = houseIconView; 
        [houseIconView release];        
    }
    else 
    {
        pinView.Annotation = Annotation;
    }

    return pinView; 

}

谢谢