Getting AGSDynamicMapServiceLayer to refresh programmatically

ChristopherDillard — Fri, 14 Dec 2012 13:46:53 GMT

I have an ArcGIS Server (10.1 SP1) REST map service whose underlying data (in ArcSDE) is changing constantly. And I have an AGSDynamicMapServiceLayer that renders that map service in my app. (It's running in iOS 6.)

I want to periodically (e.g. every 60 seconds) refresh the map to see the latest data. However, I can't seem to do it without panning or zooming.

I've tried invoking dataChanged on the layer, i.e.:

AGSDynamicMapServiceLayer* layer = ...;
[layer dataChanged];

...but it has no effect. I've tried invoking clear on the layer's view, i.e.:

AGSMapView* mapView = ...;
UIView<AGSLayerView>* layerView = [mapView.mapLayerViews objectForKey:layer.name];
[layerView clear];

...but that has no effect either (other than causing that layer to flash quickly, but reappear exactly as it was).

Is there some way to force a refresh from the server?

Is it perhaps a caching issue at the operating system level, since the URL of the exported image is the same?

Re: Getting AGSDynamicMapServiceLayer to refresh programmatically

PhilippFauser — Fri, 14 Dec 2012 16:58:16 GMT

Have you tried to remove the layer and then add it again to the mapview? Maybe that works.

Re: Getting AGSDynamicMapServiceLayer to refresh programmatically

NimeshJarecha — Sun, 16 Dec 2012 20:44:46 GMT

Try this and let me know if it does not work...

//remove all url cache
[[NSURLCache sharedURLCache] removeAllCachedResponses];
[layer dataChanged];

Regards,
Nimesh

topic Getting AGSDynamicMapServiceLayer to refresh programmatically in ArcGIS Runtime SDK for iOS Questions

Getting AGSDynamicMapServiceLayer to refresh programmatically

Re: Getting AGSDynamicMapServiceLayer to refresh programmatically

Re: Getting AGSDynamicMapServiceLayer to refresh programmatically