This sample demonstrates how to delete features from a feature layer that uses a feature service.
How it works
The sample uses the mapView:didTapAtPoint:mapPoint: method on AGSMapViewTouchDelegate to get the tapped point. Queries the feature around that point using queryFeaturesWithParameters:completion: method on AGSServiceFeatureTable. It then shows a callout for that feature using the showCalloutForFeature:layer:tapLocation:animated: method on mapView.callout. When tapped on the trash icon, it deletes feature using deleteFeature:completion: method and applies the edit to the service using the applyEditsWithCompletion: method.