Created
July 3, 2014 15:12
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| // | |
| // MKMapView+ZoomLevel.m | |
| // | |
| // Created by Daniel.Burke on 7/3/14 via Nikita Galayko @ StackOverflow | |
| // Copyright (c) 2014 Forrent.com. All rights reserved. | |
| // | |
| #import "MKMapView+ZoomLevel.h" | |
| @implementation MKMapView (ZoomLevel) | |
| - (double)zoomLevel{ | |
| CLLocationDegrees longitudeDelta = self.region.span.longitudeDelta; | |
| CGFloat mapWidthInPixels = self.bounds.size.width; | |
| double zoomScale = longitudeDelta * MERCATOR_RADIUS * M_PI / (180.0 * mapWidthInPixels); | |
| double zoomer = MAX_GOOGLE_LEVELS - log2( zoomScale ); | |
| if ( zoomer < 0 ) zoomer = 0; | |
| return zoomer; | |
| } | |
| @end |
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| // | |
| // MKMapView+ZoomLevel.h | |
| // | |
| // Created by Daniel.Burke on 7/3/14 via Nikita Galayko @ StackOverflow | |
| // Copyright (c) 2014 Forrent.com. All rights reserved. | |
| // | |
| #import <Foundation/Foundation.h> | |
| #define MERCATOR_RADIUS 85445659.44705395 | |
| #define MAX_GOOGLE_LEVELS 20 | |
| @import UIKit; | |
| @interface MKMapView (ZoomLevel) | |
| - (double)zoomLevel; | |
| @end |
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