ios - Mapbox custom user location image -

i'm using mapbox 2.1.2 need set custom image user location annotation. not problem implement both in mapkit or googlemaps how deal using mapbox?

if not possible, how can track user's location? i've tried add mglpointannotation objects on location update. have have cache of annotations , clear on adding new, recent 1 leads "flash" ugly effect.

background on customizing user location annotation: https://github.com/mapbox/mapbox-gl-native/issues/2272

the best way right follow guidance there, customize mgluserlocationannotation class in source code (the sdk open source).