Can Arcade expressions be used in AGSUniqueValueRenderer?

AndrewLeung — Sat, 19 Oct 2019 00:18:40 GMT

Can Arcade expressions be used in AGSUniqueValueRenderer in a similar fashion as the valueExpression property of UniqueValueRenderer in the JavaScript API?

I need to define symbols based on selective values across multiple attributes (e.g. attribute A = "foo" OR attribute B = "bar") and I can't figure out how to achieve that using AGSUniqueValueRenderer in the iOS SDK. Is there a way?

I also didn't have much luck subclassing AGSRenderer and defining my own symbolForFeature logic.

Re: Can Arcade expressions be used in AGSUniqueValueRenderer?

Nicholas-Furness — Fri, 25 Oct 2019 21:11:57 GMT

So it looks like valueExpression on a UVR should work, there just isn't an API in Runtime to manipulate it.

One thing you could try is to define a UVR with a valueExpression in the JS API and use toJson() on it to get back JSON, translate that JSON to a NSDictionary, then provide that dictionary to the Runtime's AGSUniqueValueRenderer.fromJSON:error:() method.

Does that help? Let me know how that goes.

Two notes:

You could get that JSON out of a saved web map using AGO Assistant if you prefer not to do any JS API code.
Another approach would be to use a Dictionary Renderer. See this blog post for some info on that.

topic Can Arcade expressions be used in AGSUniqueValueRenderer? in ArcGIS Runtime SDK for iOS Questions

Can Arcade expressions be used in AGSUniqueValueRenderer?

Re: Can Arcade expressions be used in AGSUniqueValueRenderer?