Swift Layer List Examples

Justin_Greco

Are there any examples of building a layer list from a web map, particularly one with group layers?  I am get the layers from map.operationalLayers to show in a List view, but am struggling with getting the sublayer for group layers to appear as children, since the .  The layer list is not part of the toolkit, are there plans to have add one in the future?

Justin_Greco

Was a bit easier than I had thought.  Here is a code sample:

import SwiftUI
import ArcGIS
struct LayerView: View {
    var map: Map
    var body: some View {
        List {
            ForEach(map.operationalLayers, id:\.self) { layer in
                SublayerView(layer: layer)
            }
        }
        .onAppear {
            //make all group layers visible by default
            map.operationalLayers.forEach { layer in
                if (layer.subLayerContents.count > 0) {
                    layer.isVisible = true
                    layer.subLayerContents.forEach { sublayer in
                        if (sublayer.subLayerContents.count > 0) {
                            sublayer.isVisible = true
                        }
                    }
                }
            }
        }
    }
}

struct SublayerView: View {
    var layer: Layer
    @State private var expanded: Bool = false
    var body: some View {
        if (layer.subLayerContents.count > 0) {
            DisclosureGroup(layer.name, isExpanded: $expanded) {
                ForEach(layer.subLayerContents.reversed(), id:\.self.name) {
                    sublayer in
                    if (sublayer.subLayerContents.count > 0) {
                        SublayerView(layer: sublayer as! Layer)
                    } else {
                        Toggle(isOn: Binding<Bool>(get: {sublayer.isVisible}, set: {sublayer.isVisible = $0
                        })) {
                            Text(sublayer.name)
                        }
                    }
                }
            }
        } else {
            Toggle(isOn: Binding<Bool>(get: {layer.isVisible}, set: {layer.isVisible = $0})) {
                Text(layer.name)
            }
        }
    }
}