There's ImageryTileLayer in Javascript, but I was unable to find it in iOS SDK and documentation. Is there a way to make a layer with the same source URL in iOS?
I got an answer in the official ArcGIS community:
The equivalent in ArcGIS Runtime is the AGSImageServiceRaster class, which you display via the AGSRasterLayer class:
Add raster data | ArcGIS Runtime API for iOS | ArcGIS Developers
ArcGIS Runtime SDK for iOS: AGSImageServiceRaster Class Reference