How to disable base Google Maps in MapKit

Sept 26th 2012 update :for erasing iOS6 base maps look here: https://blog.sumbera.com/2012/09/26/how-to-erase-ios6-maps-in-mapkit/ 

I have searched this and couldn’t find any answer, so here is my own research so far on this subject. You can disable MapKit base layers using 3 approaches:

#1 remove subview from MKMapView (quite bad as you will loose all overlays too)

#2 use undocumented function (bad too as this will be rejected by Apple approval process):

// get MKMapTileView from view hierarchy
UIView * mkMapTileView = [((UIView*) [ ((UIView*)[self.subviews objectAtIndex:0]).
subviews objectAtIndex:0]).subviews objectAtIndex:0];
// call undocumented method
if ( [mkMapTileView respondsToSelector:@selector(setDrawingEnabled:)]){
[mkMapTileView performSelector:@selector(setDrawingEnabled:) withObject:(id) NO];

#3 use method swizzle

inspired by http://www.mikeash.com/pyblog/friday-qa-2010-01-29-method-replacement-for-fun-and-profit.html

http://atastypixel.com/blog/making-uitoolbar-and-uinavigationbars-background-totally-transparent/

this method is fine as it is official method and enables you to ‘subclass’ a class that you don’t have access in compile time.

#import <objc/runtime.h>

// original method declaration
static void (*_origDrawLayerInContext)(id, SEL, CALayer*, CGContextRef);
// set up subclass in runtime..in some entering method
UIView * mkMapTileView = [((UIView*) [ ((UIView*)[self.subviews objectAtIndex:0]). subviews objectAtIndex:0]).subviews objectAtIndex:0];

Method  origMethod = class_getInstanceMethod([mkMapTileView class], @selector(drawLayer:inContext:));

_origDrawLayerInContext = (void *)method_getImplementation(origMethod);

if(!class_addMethod([mkMapTileView class], @selector(drawLayer:inContext:), (IMP)OverrideDrawLayerInContext, method_getTypeEncoding(origMethod)))

method_setImplementation(origMethod, (IMP)OverrideDrawLayerInContext);

// implement our Override
static void OverrideDrawLayerInContext(UIView *self, SEL _cmd, CALayer *layer, CGContextRef context) {
// possibly call original method if you leave it empty base google maps will not be displayed. You can draw custom content here as well...
//  _origDrawLayerInContext(self, _cmd, layer, context);

}

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4 thoughts on “How to disable base Google Maps in MapKit

  1. I tried you solution here.
    It worked great, but I cannot see the blue dot showing my location anymore. Is there any reason for that?

    1. yes, you can either make your own or try to postpone call of showsUserLocation e.g. like this:

      [[NSOperationQueue mainQueue] addOperationWithBlock:^{
      self.showsUserLocation = YES;

      }];

      1. Thanks for your reply.

        I couldn’t get it to work. I spent some time reveiwing NSOperationQueue but I still did not know where I should add this line for code.
        Could you clarify a bit more? Thanks.

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