showsUserLocation returns pin instead of blue dot in iPhone simulator

问题

This is my -mapView:viewForAnnotation method which drops pins when i create annotation views. But when i set mapView.showsUserLocation = YES; in -viewDidLoad, i get a pin dropped on Infinite Loop (expected - in simulator) and not the normal blue dot.

- (MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>) annotation{
     MKAnnotationView *anno = nil;
     //create a pin annotation view
MKPinAnnotationView  *pin=[[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"pin"]autorelease];

    [pin setPinColor:MKPinAnnotationColorRed];
    pin.animatesDrop=YES;
    pin.canShowCallout = YES;
    pin.calloutOffset = CGPointMake(-5, 5);
    anno = pin;
    return anno;
}

How can i get it to drop pins and show the blue dot as well?

Thanks

回答1:

Really simple to fix, although unsure if this is the correct way to do it...

if (annotation == mapView.userLocation){
    return nil; //default to blue dot
}

回答2:

Similar to the other answer, here's something close:

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation 
{
    NSString *annotationType = [NSString stringWithCString:object_getClassName(annotation)];
    if ([annotationType compare:@"NSKVONotifying_MKUserLocation"] == 0)
        return nil;
    ...
}

Of course, use something like this at your own risk. It could stop working tomorrow if Apple decided to change that name.

回答3:

Often you use your own class of annotation to look up information related to the annotation. In that case, to only handle your own annotations, use something like

if ([annotation isKindOfClass:[MapLocation class]]) {}

来源：https://stackoverflow.com/questions/1853144/showsuserlocation-returns-pin-instead-of-blue-dot-in-iphone-simulator

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iphone

mkmapview

mkpinannotationview