how to replace layer url with portalItem for offline Arcgis runtime sdk

Question

I am trying to gave offline access to my app. I am using ArcGis runtime 100 sdk. while implementing the same I found

//instantiate offline map task
    self.offlineMapTask = AGSOfflineMapTask(portalItem: self.portalItem)

this code of line to start with. But when i did some research then found that we can use LayerUrls in place of PortalItem.

How should i replace it with layer url

Answer 1

To create an Offline Map Task, you can pass in a Map or a Portal Item that points at a Web Map.

You can use Layer URLs when creating Feature Layers (e.g. to add to a Map's operational layers).

I think you may be conflating Web Maps with Feature Layers.

By the way, for future questions: you could consider asking in the iOS Runtime SDK forum?