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POiPhone MapKit: Custom MKPolygonView with image draws upside down
 

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  1. POiPhone MapKit: Custom MKPolygonView with image draws upside down
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    <p>does anybody know what to do with this problem: my image in a custom MKPolygonView is flipped upside down? </p> <p>The idea (this is working OK already) is having an class "SnowmapsOverlayView" that extends "MKPolygonView", that displays a image. This image has a default location &amp; size on the map (acts as a GroundOverlay in the Google Maps web API). This is all working fine, but the image is displayed upside down. I've tryed the following options, but with no result: </p> <p><a href="https://stackoverflow.com/questions/506622/cgcontextdrawimage-draws-image-upside-down-when-passed-uiimage-cgimage">CGContextDrawImage draws image upside down when passed UIImage.CGImage</a></p> <p>Thanks for any help or suggestions!</p> <p>My code:</p> <pre><code>#import &lt;MapKit/MapKit.h&gt; @interface SnowmapsOverlayView : MKPolygonView { } @end ----------------- #import "SnowmapsOverlayView.h" @implementation SnowmapsOverlayView -(id)initWithPolygon:(MKPolygon *)polygon { self = [super initWithPolygon:polygon]; return self; } -(void)drawMapRect:(MKMapRect)mapRect zoomScale:(MKZoomScale)zoomScale inContext:(CGContextRef)context { UIImage *image = [UIImage imageNamed:@"snowmap.png"]; //This should do the trick, but is doesn't.. maybe a problem with the "context"? //CGRect imageRect = CGRectMake(0, 0, image.size.width, image.size.height); //CGContextTranslateCTM(context, 0, image.size.height); //CGContextScaleCTM(context, 1.0, -1.0); CGRect overallCGRect = [self rectForMapRect:self.overlay.boundingMapRect]; CGContextDrawImage(context, overallCGRect, image.CGImage); } -(BOOL)canDrawMapRect:(MKMapRect)mapRect zoomScale:(MKZoomScale)zoomScale { return YES; } </code></pre>
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    1. COYou just helped me solve a big problem .. Thanks!!
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      1. POiPhone MapKit: Custom MKPolygonView with image draws upside down
      1. USManish Burman
 

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