How to solve accuracy problem in ArcGIS Map when current user position is not move on to proper route.

[tejveer]

we have generate route on the map  source to destination and that current user position move on to route but not moving on accurate position on the route. so please check given below some screen shot attached..

[Nicholas-Furness]

The Runtime does not currently perform any correction on the GPS location returned by iOS. That would be part of a full Navigation experience that is not at present part of the Runtime.

You might find the suggestion made here useful. Essentially, create a custom AGSLocationDataSource that is aware of the route result that you've obtained and intelligently snaps the raw GPS locations to the route geometry before returning that modified AGSLocation to the runtime.