Error Removing Single/Sequence Operational Layer(s) but removing all works? Maps SDK 200.1.0

vansant

Here is a method that toggles the state of a boolean variable called imageryOn.

 

When I tap a button the code runs, and I am able to set the first object in the Operational Layers array as a ArcGISTiledLayer. Cool, tapping the on screen button shows the satellite imagery hosted service on the map and sets it to Operational Layers at index 0.

 

When I toggle the imageryOn bool to false I get an error message when trying to remove the first operational layer:

Thread 1: Fatal error: Object is already in use and may not be reused.

 

However, if I used the removeAllOperationalLayers method I am able to remove all operational layers (including the imagery layer). And the toggle then just shows imagery on and then imagery off.

 

func toggleImagery(){

        imageryOn = !imageryOn

        

        print(map.operationalLayers)

        

        if imageryOn {

            let imageryLayer = ArcGISTiledLayer(url: URL(string: "https://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer")!)

            map.insertOperationalLayer(imageryLayer, at: 0)

            print(map.operationalLayers.first!)

            

            print(map.operationalLayers)

            

        } else {

            map.removeOperationalLayer(map.operationalLayers[0])

            //map.removeAllOperationalLayers()

        }

    }

 

 

Any ideas on what could be going on here? 

 

Thanks

Ting

Thanks for reporting! This bug will be fixed in the next release of the SDK. It is due to a misuse of the mutable array in the SDK.

In the meantime, you can still use the "remove all" approach, or set the isVisible property on the layers to show/hide a layer.