topic Re: Callouts for Non-Features in ArcGIS Runtime SDK for iOS Questions

Callouts for Non-Features

GlennWilson1 — Wed, 04 May 2016 21:37:46 GMT

Is it possible to create a callout that shows information for layers in the map.operationalLayers list?

Re: Callouts for Non-Features

GlennWilson1 — Sat, 11 Dec 2021 18:47:15 GMT

Well, I feel like I'm the only one developing with the iOS SDK right now -- kinda quiet on the forum.

There's not much in the way of examples utilizing the beta SDK, but after doing a little experimenting, I thought I might have come across a way to do this:

    // respond to touch event
    
    func mapView(mapView: AGSMapView, didLongPressAtPoint screen: CGPoint, mapPoint mappoint: AGSPoint) {
        if self.mapView.callout.hidden {
            let callout = self.mapView.callout
            callout.title = "Location"
            callout.detail = String(format: "x: %.2f, y: %.2f", mappoint.x, mappoint.y)
            callout.accessoryButtonType = UIButtonType.DetailDisclosure
            callout.accessoryButtonHidden = false
            
            let completionBlock: (([AGSIdentifyLayerResult]?, NSError?) -> Void)! = {
                (layers, error) in
                if (error != nil) {
                    callout.detail = "There are no layers where you pressed.  Got error: \(error.debugDescription)\n"
                } else {
                    let details = "There are \(layers?.count) layers where you pressed."
                    print(details)
                    
                    for layer in layers! {
                        print("Layer: \(layer.layerContent.name)=\(layer.layerContent.subLayerContents.count)")
                        print("-->sublayers: \(layer.sublayerResults)")
                    }
                    callout.detail = details
                }
                callout.autoAdjustWidth = true
                callout.showCalloutAt(mappoint, screenOffset: CGPointZero, rotateOffsetWithMap: false, animated: true)

            }
            mapView.identifyLayersAtScreenPoint(screen, tolerance: 5, maximumResultsPerLayer: 2, completion: completionBlock)

        } else {
            self.mapView.callout.dismiss()
        }
    }

However, this returns all of the layers in the mapView.operationalLayers array -- not the layers at the given map-point (line 29). I might be missing something obvious in the logic, but after looking at this for two days, I'm still striking out. Any ideas/suggestions would be greatly appreciated.

Re: Callouts for Non-Features

DiveshGoyal — Thu, 12 May 2016 17:34:46 GMT

>this returns all of the layers in the mapView.operationalLayers array -- not the layers at the given map-point

Yes, it currently (quartz beta2) returns results for every layer, but we plan to change that to return results for only those layers that have features at that location. For now, you will have to filter out the AGSIdentifyLayerResult that do not have any associated geoElements - that's a sign there were no features for that layer at the location

PS - For quartz beta related questions, please post to forums in the Early Adopter site

https://earlyadopter.esri.com/project/forum/topic.html?cap=59D261350FB84BE48C01CF04BF2A3AA1&forid={F6786AAB-E6F4-4996-98…