Question

I am making an MKMapView that shows the user’s current location.
I want to rotate the map like the Google Maps App without rotating the annotations. Im using the following code

-(void) locationManager:(CLLocationManager *)manager didUpdateHeading:(CLHeading *)newHeading{
     mapView.transform=CGAffineTransformMakeRotation(-1*newHeading.magneticHeading*3.14159/180)};

but the whole view is rotated like this image.
The image of the problem in my app

Answer 1

You basically need to apply a the same transform to all annotation views but with negative angle, i.e.

for (id<MKAnnotation> annotation in mapView.annotations) 
{
    MKAnnotationView* annotationView = [mapView viewForAnnotation:annotation];
    [annotationView setTransform:CGAffineTransformMakeRotation(-angle)];
}

If you’re planning to add more annotations you should place the same code in mapView:didAddAnnotationViews: too:

- (void)mapView:(MKMapView *)mapView didAddAnnotationViews:(NSArray *)views
{
    for (MKAnnotationView* annotationView in views) 
    {
        [annotationView setTransform:CGAffineTransformMakeRotation(-angle)];
    }
}