topic Re: map.operationalLayers repeating Layer in Qt Maps SDK Questions

map.operationalLayers repeating Layer

MKa — Sat, 11 Dec 2021 22:23:56 GMT

Has anyone ever had an issue with the operational layers repeating a layer when looping through them? It seems to happen on mobile devices and on appstudio mobile but not on desktop app.

I am simply wanting to loop though the layers, but I seem to have a repeating layer.

 map.operationalLayers.forEach(function(value) {
    popupMessageBox.messageText += "\nvalue.name = " + value.name
 });‍‍‍‍‍‍

In this above example with 4 layers, the first time I run it, it gives me this result

layer.name = 1

layer.name = 2layer.name = 3layer.name = 4

Then I run it again and I get this result. It seems to happen intermittently and only on my mobile device

layer.name = 1

layer.name = 2layer.name = 2layer.name = 4

Wondering if anyone has seen this type of behavior?

Re: map.operationalLayers repeating Layer

JamesBallard1 — Wed, 15 May 2019 21:06:58 GMT

Hi M Ka‌,

I'm not aware of any problems like that. Can you provide some more information, or maybe even a small reproducer app that shows the problem?

You mentioned mobile. Is that Android or iOS? Also, what version of Runtime are you using?

Re: map.operationalLayers repeating Layer

MKa — Tue, 21 May 2019 21:04:13 GMT

I can not figure out why this is happening. It is happening in both IOS and Android and i am running the latest version of Runtime. I have added 4 layers to my webmap and on mobile (cell) only, it sometimes is repeating the layers when I loop through the operational layers of a given map.

Re: map.operationalLayers repeating Layer

MKa — Tue, 21 May 2019 21:12:04 GMT

Is there a way to requery the operationallayers of a map? It is almost like on mobile, it takes longer to load and somehow a duplicate is getting returned in my above loop. Again, this only happens on the mobile and it happens using the AppStudio mobile app.

Re: map.operationalLayers repeating Layer

MKa — Sat, 11 Dec 2021 22:23:59 GMT

I am loading a MapView page with a loader, but on mobile when looping through the operational layers I am getting duplicates. When I return to the page or come into the mapview for the first time.


MapView {
    map: MapFieldSelectedLoader.item
.
.
.

Component.onCompleted: {
        MapFieldSelectedLoader.sourceComponent = MapFieldSelected;        
    }
.
.
.
.
Loader {
        id: MapFieldSelectedLoader
    }

    Component {
        id: MapFieldSelected

        Map {
            id: mapFieldSelected
            autoFetchLegendInfos: true
            initUrl: app.webMapUrl

            //This returns the duplicate layer when looping through on mobile
            onLoadStatusChanged: 
            {
                    if (loadStatus === Enums.LoadStatusLoaded)
                    {                        
                     operationalLayers.forEach(function(lyr) {
                     popupMessageBox.messageText += "\n Loaded lyr.name = " + lyr.name                            
                        });
                    }
            }
        }
    }

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Re: map.operationalLayers repeating Layer

JamesBallard1 — Tue, 21 May 2019 22:44:21 GMT

M Ka‌,

Thanks for the additional info. Is the web map you're accessing public? If so, please share the url and we can try to reproduce the problem on our end.

Re: map.operationalLayers repeating Layer

MKa — Wed, 22 May 2019 16:28:21 GMT

Could I get an email in which to send the URL of the WebMap to. I will need to grant you access and give you a username and password to our portal that holds the web map. I cannot make the whole thing public.

Re: map.operationalLayers repeating Layer

JamesBallard1 — Wed, 22 May 2019 16:36:08 GMT

M Ka‌ thanks for the offer. I'll see if I can find a web map with four (or more) layers that we have access to and see if I can reproduce the problem that way.

Re: map.operationalLayers repeating Layer

MKa — Wed, 22 May 2019 16:44:47 GMT

That would be so helpful. You will need to load a mapview/loader/map page again and again, looking at the operational layers on load. Mine seems to repeat them quite frequently as I mentioned above

Re: map.operationalLayers repeating Layer

MKa — Wed, 22 May 2019 17:28:02 GMT

I just created a Web map with these layers

I then call up a MapView page pointing to this Web Map and loader like the code I have above. It give me duplicates for the the operational layers when I loop through the layers on the load of the map. This happens when I Pop the MapView off and then back on, which in turn forces the map on the mapview to reload as it is a new page. It happens about every other time and ONLY on my mobile devices.

Re: map.operationalLayers repeating Layer

JamesBallard1 — Tue, 28 May 2019 20:46:00 GMT

M Ka‌, one of my colleagues tried this out in a test and wasn't able to reproduce the problem on a mobile device. That was using the same code you provided with a different web map. If you're able, please log the issue with Esri support so we can follow up.

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