google-maps-ios-utils
Customize cluster and item markers
As of version 1.1.0 we have added new features for easy customization of
markers. There is a new delegate GMUClusterRendererDelegate on GMUDefaultClusterRenderer which allows
developers to customize properties of a marker before and after it is added
to the map. Using this new delegate you can achieve something cool like this:
See CustomMarkerViewController for the implementation.