Background location tracking

[ShiminCai]

Hi,

I'm looking for ideas of how to track user's movement in background thread... While user is collecting point, line or polygon features and moving around in field, I also want to record his route and ultimately save it as a line feature to the local geodatabase. Note that the map's touch delegate has been already used by the sketch layer in the main thread. Is this possible?

Thanks,

Shimin

[GagandeepSingh]

Hi Shimin Cai‌,

You can use Key-Value Observing approach for this. You can add an observer for "self.mapView.locationDisplay.mapLocation" and every time it changes you just insert a new point

into the AGSSketchGraphics which is already instantiated with an AGSMutablePolyline.

Let me know if this helps.

[ShiminCai]

Hi Gagandeep,

Thanks for the idea. I'll give it a go...

Cheers,

Shimin

[DiveshGoyal]

Have you checked out the GPSSketchingSample‌ ?

[ShiminCai]

Hi Divesh,

Thanks for the suggestion.

Yes I did. It uses a sketchGraphicsLayer as the mapView.touchDelegate and inserts a point into the sketchGraphicsLayer in the locationManager's delegate whenever there is a location update. If I don't set up the map's touch delegate it doesn't work. In my case, the map's touch delegate has been already used by the sketching (point, line & poly) on the main thread. I need to record user's movement in a background thread without any user interaction...

Thanks,

Shimin