Submits the request to create a snapshot and executes the resulting block on the specified queue.
- iOS 7.0+
- macOS 10.9+
- tvOS 9.2+
The dispatch queue on which to execute the block specified by the
The block to call with the resulting snapshot. This block must not be
Call this method to begin generating a snapshot image based on the specified parameters. This method executes the request asynchronously. When rendering is complete, the snapshotter delivers the results to your block on the dispatch queue in the
The snapshotter delivers the final image to your app only when it is running in the foreground. The snapshotter must render the final image while your app is in the foreground. If you start generating a snapshot while the app is in the background, or if your app moves to the background while a snapshot is in progress, this behavior delays the delivery of the snapshot until your app returns to the foreground.
In macOS, this method creates both standard and high-resolution representations of the map data and includes both in the returned image object. In iOS, you must specify the image scale you want using the snapshot options, which default to the scale on the current device.