如何在完整地图的mapbox ios sdk中拍摄快照

Question

/** @name Capturing Snapshots of the Map View */

/** Take a snapshot of the map view. By default, the overlay containing any visible annotations is also captured. @return An image depicting the map view. */

- (UIImage *)takeSnapshot;

/** Take a snapshot of the map view.

@param includeOverlay Whether to include the overlay containing any visible annotations.

@return An image depicting the map view. */

- (UIImage *)takeSnapshotAndIncludeOverlay:(BOOL)includeOverlay;

Answer 1

Actually You can use a method called takeSnapshot in a RMMapView it returns an UIImage so you can use it for whatever you want, here is an example blurring my snapshot

-(UIImage*) performScreenshotAndBlur
{
    UIImage *blurImage = self.mapView.takeSnapshot;
    blurImage = [blurImage applyBlurWithRadius:10 tintColor:[UIColor colorWithRed:0.067 green:0.067 blue:0.067 alpha:0.2] saturationDeltaFactor:1.8 maskImage:nil];
    return blurImage;
}

Answer 2

This depends on which zoom level you are at. If it is the furthest zoomed out possibly (somewhere from z0-2 , depending on device size), the world will be 256 , 512 , or 1024px on a side. If it's zoomed in much further, say to street level at z17 , you are talking about 2 ^ 17 * 256 or 33,554,432px on each side of the image. This is why maps are drawn tiled and why this functionality isn't built in by default.