Custom annotation pin changes to default red pin at long tap - iphone

Question

I have custom annotation pin at app:
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
return [kml viewForAnnotation:annotation type:state];
}
where I return custom view and make setImage for annotationView of Placemark such as:
- (MKAnnotationView *)viewForAnnotation:(id <MKAnnotation>)point type:(int)state
{
// Find the KMLPlacemark object that owns this point and get
// the view from it.
for (KMLPlacemark *placemark in _placemarks) {
if ([placemark point] == point)
{
UIButton *disclosureButton = [UIButton buttonWithType: UIButtonTypeDetailDisclosure];
[[placemark annotationView] setCanShowCallout: YES];
[[placemark annotationView] setRightCalloutAccessoryView:disclosureButton];
if (state == 0)
{
[[placemark annotationView] setImage:[UIImage imageNamed:#"ic_pin_tour.png"]];
}
else
{
[[placemark annotationView] setImage:[UIImage imageNamed:#"ic_pin_point.png"]];
}
return [placemark annotationView];
}
}
return nil;
}
but if I long tap at my annotation pin it changes appearance to its default view (RedPin).
I cannot understand what method is called on long tap. I tried to play with UITapGestureRecognizer, but did not find out. If I just tap annotation pin all works fine and my custom annotation pin view doesn't disappear.
You can see what I mean in this screenshot:
So, why annotation pin appearance changes on long tap?

Answer 1

So, if you want to use a custom image for an annotation view, always use a generic MKAnnotationView instead of an MKPinAnnotationView.
I have MKPinAnnotationView at just one place, when I replace it with MKAnnotationView everything works properly now:
- (MKAnnotationView *)annotationView
{
if (!annotationView) {
id <MKAnnotation> annotation = [self point];
if (annotation) {
MKAnnotationView *pin =
[[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:nil];
pin.canShowCallout = YES;
annotationView = pin;
}
}
return annotationView;
}