Returns a Boolean indicating whether the overlay content replaces the underlying map content.
- iOS 7.0+
- macOS 10.9+
- Mac Catalyst 13.0+
- tvOS 9.0+
true if the map view can skip the loading and drawing of the underlying map tiles or
false if the map tiles should still be drawn.
The map view uses the return value of this method as a hint to determine whether it should load and render its tiles. If your overlay covers its designated region entirely with opaque content, and effectively replaces the content of underlying map tiles, implement this method and return
true. Doing so alleviates the need for the map to render its tiles.
If you do not implement this method, or if you return
false from it, the map view continues to load and render its tiles.