I am working on an app using the ArcGIS iOS SDK.
I am reading in Maps from the ArcGIS Online portal. These maps often contain a variety of layers, i.e. Image Layers, FeatureCollections layers, WMS layers, etc. I need a convenient function within the SDK to enable the app to discover the type of layer dynamically, and I then want to go on to operate in various functions on a selected layer, e.g. display its sublayers.
I have been scouring the SDK reference but I cannot determine how to do this yet. Has anyone else managed this?
I did locate the function to determine the portal type: ArcGIS Runtime SDK for iOS: AGSPortalItem Class Reference
However, I want to go down to the next level and determine the type of layer contained within the operational layers after they have been loaded into a map when using an portal identifier to identify the particular map.
I'd like to be able to write the following Swift code:
var layerType:String!
...
//loop over the operational layers and save into an array
..
//save the object present in the operational layers array
let layer = self.layers?[index] as! AGSLayer!
layerType = layer?.<what can be used to capture the layer type as a string here?>
...
if (layerType == "AGSArcGISMapImageLayer") {
self.mapImageLayer = self.layers?[index] as! AGSArcGISMapImageLayer!
}
if (layerType == "AGSFeatureCollectionLayer") {
self.mapFeatureCollectionLayer = self.layers?[index] as! AGSFeatureCollectionLayer!
}
if (layerType == "AGSWMSLayer") {
self.mapWMSLayer = self.layers?[index] as! AGSWMSLayer!
}
if (layerType == "AGSTiledMapServiceLayer") {
//Do something else
}
if (layerType == "AGSDynamicMapServiceLayer") {
//Do something else
}
if (layerType == "AGSImageServiceLayer") {
//Do something else
}
etc.
However, unless I'm missing something, when I load all the operational layers in the map into an array of layers, the layer type is not offered in the AGSLayer class.
I can get the name, description, attribution, layerID, extent, etc. but no layer type.
Any help you guys can give will be appreciated.
Thanks!
