Merge pull request #894 from chrigi/master

Fix iOS toDataURL Image Artifact

Author: wf9a5m75

src/ios/GoogleMaps/Map.m

@@ -258,7 +258,7 @@ -(void)updateCameraPosition: (NSString*)action command:(CDVInvokedUrlCommand *)c
 
 - (void)toDataURL:(CDVInvokedUrlCommand *)command {
   UIGraphicsBeginImageContext(self.mapCtrl.view.frame.size);
-  [self.mapCtrl.map.layer renderInContext:UIGraphicsGetCurrentContext()];
+  [self.mapCtrl.view drawViewHierarchyInRect:self.mapCtrl.map.layer.bounds afterScreenUpdates:NO];
   UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
   UIGraphicsEndImageContext();