nav[aria-label="Primary Navigation"] { padding: 0; & ul { list-style: none; width: 100%; display: flex; flex-direction: row; justify-content: start; align-items: start; gap: 30px; padding: 0; & li { margin: 0; } & ul li { list-style: none; } } }

No features visible using AGSServiceFeatureTable and AGSFeatureLayer

A_A_

Hi,

I'm trying to display a feature layer using a feature table, so I can identify the features when clicked on.

This is my code:

AGSCredential *cred = [[AGSCredential alloc] initWithUser:@... password:@...];

AGSServiceFeatureTable *featureTable = [AGSServiceFeatureTable serviceFeatureTableWithURL:[NSURL URLWithString:@"https://arcgis.../MapServer"]];

featureTable.credential = cred;

AGSFeatureLayer *featureLayer = [[AGSFeatureLayer alloc] initWithFeatureTable:featureTable];

[map.operationalLayers addObject:featureLayer];

Is there anything wrong with this code?

I also tried AGSArcGISMapImageLayer as an alternative (which works), but the features can't be identified with this method.

Any help is appreciated!

Encuentra más publicaciones etiquetadas con

Accepted answers

All comments

Nicholas-Furness

Your URL is pointing at the service, but you should specify an individual layer URL within that service. So perhaps add "/0" to the end of the URL to make "https://arcgis.../MapServer/0" (if there are multiple layers, use the right layer index).

Let me know if that's the issue.

You could also call loadWithCompletion() on featureTable and check for any error in the completion block. That could give you some indication of what's going wrong.

Nick.

A_A_

Thanks for your reaction Nicholas.

Adding the layer index did not solve the issue. The mapserver has several layers and sublayers, which all need to be visible. So I tried adding the top layer (index 0), hoping all the sublayers would be displayed, but it did not work.

Also, I called the loadWithCompletion() and apparently I'm getting an "Invalid JSON" error.

It says this in the release notes:

Loading a ServiceFeatureTable causes an invalid JSON error when the service contains a reserved field name, such as one that starts with "gdb_".

I think this does not apply in our situation. You can find the layer's JSON in the attachment.

JSON.pdf

JSON.rtf

Nicholas-Furness

Sorry. I misread. Entirely my fault. You want to use an AGSArcGISMapImageLayer for a MapService endpoint.

Forget the "/0" on the end, instead of the AGSFeatureServiceTable and AGSFeatureLayer, simply instantiate an AGSArcGISMapImageLayer. See this sample.

That'll add the layer to the map.

Nick.

P.S. If you need access to the individual features and attributes, the layer's publisher will need to enable that (if it isn't already) and then there'll be a FeatureService sibling to the MapService which you can access as per my answer from yesterday.

A_A_

I made some progress...

I tried adding the AGSArcGISMapImageLayer, which shows all the layers just like we want. But we can't identify the GeoElements using identifyLayer() (and calling the method is also very slow). The GeoElements array shows up empty every time a feature is selected.

So I went back to using AGSFeatureServiceTable and AGSFeatureLayer. I can add the individual (feature) layers in a feature service table and the features can also be identified. But I can't get the layers to be added all at once. ( like a AGSArcGISMapImageLayer). Is there even a possibility to this using AGSFeatureServiceTable? The layers in the MapService are at different layer levels (group layers and feature layers -> total of 156), so I can't really add all the layers manually.

Únete a la Conversación

Los miembros registrados pueden publicar, seguir actualizaciones y más. ¿Nuevo aquí? Regístrate gratis.

Enlaces Rápidos

Community Help
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.