iosmkmapviewmkcoordinatespan

iOS MapView not updating to specified span

I have a map in my iOS application that won't set the visible region to where I'm specifying it.

- (void)mapView:(MKMapView *)aMapView didUpdateUserLocation:(MKUserLocation*)aUserLocation    
{
    MKCoordinateSpan span;
    span.latitudeDelta = .011932;
    span.longitudeDelta = 0.011242;
    MKCoordinateRegion region;
    region.center = self.mapView.userLocation.coordinate;
    region.span = span;
    [aMapView setRegion:region animated:YES];
}

That's my code and you would assume it would work, it's pretty straightforward and all. However, it sets the visible region to a slightly but noticeable region above what I want. I printed out the span delta values in mapView:regionDidChangeAnimated and the values I got back are:

Span: 0.014576, 0.013733

Which is not what I set it to.

Any thoughts as to why? More than anything, I really want to understand why this is happening and if it's a product of using Apple Maps or it's some wonky thing that I'm doing wrong. Upvote if you wouldn't mind so other people who have this issue can get a fix.

Solution

  • This has been a problem with MKMapView forever. Setting the region doesn't set the exact region you pass into it.