MKMapView - How to detect zoom vs drag event

How to detect zoom vs drag event on MKMapView.

I want to reload the map in case users want to drag/scroll map to new position. I don't want to reload the Map with zoom in/out event.

I found a solution:

1. Keep the previous zoom level.
2. In the regionDidChangeAnimated delegate method, get new zoom level of the Map and check it with the previous level.

This is my code:

#define MERCATOR_RADIUS 85445659.44705395
#define kVerySmallValue (0.000001)

- (BOOL)compare2Double:(double)first isEqualTo:(double)second {
    
    if(fabs(first - second) < kVerySmallValue)
        return YES;
    else
        return NO;
}
                                              
- (double)getZoomLevel
{
    static double maxGoogleLevels = -1.0;
    
    if (maxGoogleLevels < 0.0)
        maxGoogleLevels = log2(MKMapSizeWorld.width / 256.0);
    
    CLLocationDegrees longitudeDelta = self.mapView.region.span.longitudeDelta;
    CGFloat mapWidthInPixels = self.mapView.bounds.size.width;
    double zoomScale = longitudeDelta * MERCATOR_RADIUS * M_PI / (180.0 * mapWidthInPixels);
    double zoomer = maxGoogleLevels - log2( zoomScale );
    if ( zoomer < 0 ) zoomer = 0;
    NSLog(@"zoom: %f",zoomer);
    return zoomer;
}
                   
- (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated {
    
    double newZoom = [self getZoomLevel];
    if ([self compareDouble:newZoom isEqualTo:zoomLevel]) {
        NSLog(@"Drag");
    }else{
        zoomLevel = newZoom;
        NSLog(@"Zoom");
    }
    
}