Returns a Boolean value indicating whether the overlay view is ready to draw its content.
- iOS 7.0+
- macOS 10.9+
- tvOS 9.2+
The map rectangle that needs to be updated.
The current scale factor applied to the map.
YES if this overlay renderer is ready to draw its contents on the map or
NO if it is not.
Overlay renderers can override this method in situations where they may depend on the availability of other information to draw their contents. For example, a renderer showing traffic information might want to delay drawing until it has all of the traffic data it needs. In such a case, it can return
NO from this method to indicate that it is not ready. An overlay renderer might also return
NO if it does not draw content in the specified rectangle.
If you return
NO from this method, your application is responsible for calling the
set method when the overlay renderer subsequently becomes ready to draw its contents.
The default implementation of this method returns