使MKMapView的背景颜色变暗而不会使MKOverlay变暗 [英] Darkening the MKMapView's background color without darkening the MKOverlay

问题描述

如何使 MKMapView 的背景颜色变暗， NOT 使 MKOverlay 同时在 MKMapView 中 - 类似于Nike + app中的地图视图。

How would one darken the MKMapView's background color, and NOT darken the MKOverlay in the MKMapView's at the same time -- similar to the map view in the Nike+ app.

推荐答案

好的，我在这里得到了解决方案，在向地图添加其他叠加层之前，您可以将总叠加层添加为地图的背景，这样地图的背景颜色会发生变化，但是覆盖仍然像以前一样，这里是代码

OK , I got the solution here ,before add other overlays to the map ,you can add a total overlay as a background to the map ,so the map's background color is changed ,but the overlay is still as they are before ,here are codes

MKMapRect worldRect = MKMapRectWorld;
    MKMapPoint point1 = MKMapRectWorld.origin;
    MKMapPoint point2 = MKMapPointMake(point1.x+worldRect.size.width,point1.y);
    MKMapPoint point3 = MKMapPointMake(point2.x, point2.y+worldRect.size.height);
    MKMapPoint point4 = MKMapPointMake(point1.x, point3.y);

    MKMapPoint points[4] = {point1,point2,point3,point4};
    self.polygon = [MKPolygon polygonWithPoints:points count:4];
    [self.runMapView addOverlay:self.polygon];

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