Callout and Attachment

Question

Hi, I am new to ArcGIS API for IOS.

Currently, I am working on a project that show a callout and related attachment on feature layer. My application has some active featureserver layers. I perform identify task on the mapserver related to those featureserver. When I get AGSIdentifyResult on didExecuteWithIdentifyResults function, How do I know which featureserver the result.feature come from?

MiraMuliati · Answer

I got exception when casting AGSGraphicLayer to AGSFeatureLayer and call objectIdForFeature on casted AGSFeatureLayer. According to API reference, AGSFeatureLayer is subclass of AGSGraphicLayer. Is it possible to cast superclass to subclass?

Thus, I save all active feature layer in featureLayerArray and in didExecuteWithIdentifyResults i have :
for (AGSIdentifyResult* result in results) {

...
        // Retrieve attachment
        int objectId = -99;
        for (AGSFeatureLayer* currentFeatureLayer in self.featureLayerArray) {
            objectId = [currentFeatureLayer objectIdForFeature:result.feature];
            NSLog(@objectID : %d, objectId);
        }

The problem is i always get objectID = 0. Why?

MiraMuliati · Answer

you can just cast it 
AGSFeatureLayer *featureLayer = (AGSFeatureLayer *)result.feature.layer;

Oh, Ok! I will give it a try. Thx again Ed.. 🙂

EddieJesinsky · Answer

you can just cast it 
AGSFeatureLayer *featureLayer = (AGSFeatureLayer *)result.feature.layer;