iOS: User location turns into pin - ios

Question

I have a mapView with a strange behavior: When I open it, everything works fine. The user (blue with circles) is going to be located and the 3 pins are in position. But (I don't know why) after a some time, the blue point turns into a pin - but only when I have slow connection speed.
Here's what I got:
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
MKPinAnnotationView *pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:#"pinView"];
if (!pinView && ![annotation isKindOfClass:[MKUserLocation class]])
{
pinView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:#"pinView"];
pinView.pinColor = MKPinAnnotationColorRed;
pinView.animatesDrop = YES;
pinView.canShowCallout = YES;
UIButton *rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
pinView.rightCalloutAccessoryView = rightButton;
if (annotation == self.locationZH1)
{
[pinView setTag:1];
}
else if (annotation == self.locationZH2)
{
[pinView setTag:2];
}
else if (annotation == self.locationZH3)
{
[pinView setTag:3];
}
else if (annotation == self.locationLU1)
{
[pinView setTag:4];
}
}
else
{
pinView.annotation = annotation;
}
return pinView;
}

Answer 1

Be sure to avoid providing an annotation view for the built in user location marker.
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation
{
//check annotation is not user location
if([annotation isEqual:[mapView userLocation]])
{
//bail
return nil;
}
static NSString *annotationViewReuseIdentifer = #"map_view_annotation";
//dequeue annotation view
MKPinAnnotationView *annotationView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:annotationViewReuseIdentifer];
if(!annotationView)
{
annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:annotationViewReuseIdentifer];
}
//set annotation view properties
[annotationView setAnnotation:annotation];
return annotationView;
}
By checking for the user location annotation earlier, you can provide an early out for returning nil rather than allocating a new MKPinAnnotationView and returning that instead.
The documentation for - (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation states:
If the object in the annotation parameter is an instance of the
MKUserLocation class, you can provide a custom view to denote the
user’s location. To display the user’s location using the default
system view, return nil.

Answer 2

Swift 3 Solution :
if annotation is MKUserLocation{
return nil
}

Answer 3

You need to return nil when annotation == mapView.userLocation to show the blue dot for user location and the circle around it
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
MKPinAnnotationView *pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:#"pinView"];
if (!pinView && ![annotation isKindOfClass:[MKUserLocation class]])
{
pinView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:#"pinView"];
pinView.pinColor = MKPinAnnotationColorRed;
pinView.animatesDrop = YES;
pinView.canShowCallout = YES;
UIButton *rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
pinView.rightCalloutAccessoryView = rightButton;
if (annotation == self.locationZH1)
{
[pinView setTag:1];
}
else if (annotation == self.locationZH2)
{
[pinView setTag:2];
}
else if (annotation == self.locationZH3)
{
[pinView setTag:3];
}
else if (annotation == self.locationLU1)
{
[pinView setTag:4];
}
return pinView;
}
else
{
pinView.annotation = annotation;
return Nil;
}
}