Map overlays are all content that overlays or overlays a map, such as annotations, vector graphic elements (such as stitches, polygons, and circles), positioning icons, and more. The overlay has its own geographic coordinates, and as the user drags or zooms the map, the overlay moves with the map.

[Navinfo Navigation SDK for iOS] provides the following overlays:

• MBCircleOverlay class

  Use MBCircleOverlay to realize the function of drawing circles

• MBPolylineOverlay class

  Using MBPolylineOverlay to achieve line drawing and screen functions

• MBPolygonOverlay class

  Drawing polygons with PolygonOverlay

• MBAnnotation class

  Use MBAnnotation to display bubble function

• MBIconOverlay class

  Use MBIconOverlay to implement the function of displaying icons

• MBRouteOverlay class

  Using MBRouteOverlay to implement the function of drawing a route layer