topic Re: zoom to graphics layer selected in ArcGIS Runtime SDK for iOS Questions

zoom to graphics layer selected

LucaAlferi1 — Thu, 05 Apr 2012 08:02:21 GMT

Hi
i have a problem
I developed an application that allows you to query a layer Dynamics. I would like to center the selected feature in the map.
Help me
thanks

Re: zoom to graphics layer selected

NimeshJarecha — Thu, 05 Apr 2012 16:41:21 GMT

You can get the geometry of the selected feature and use AGSMapView's zoomToGeometry method to zoom to it.

Regards,
Nimesh

Re: zoom to graphics layer selected

JerryChapman — Sat, 11 Dec 2021 12:02:11 GMT

Hi Luca,

I'm fairly new at this, but this is how I did mine.

#pragma mark AGSQueryTaskDelegate

//results are returned
- (void)queryTask:(AGSQueryTask *)queryTask operation:(NSOperation *)op didExecuteWithFeatureSetResult:(AGSFeatureSet *)featureSet 
{
    if ([featureSet.features count] == 0) 
    {
     UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error"
                                                            message:@"Address not Found"
                                                           delegate:nil
                                                  cancelButtonTitle:@"OK"
                                                  otherButtonTitles:nil];
        [alertView show];
    }
    else
    {
        AGSGraphic *graphic = [featureSet.features objectAtIndex:0];
        AGSMutablePoint *pt = [graphic.geometry.envelope.center mutableCopy];
        AGSMutableEnvelope *env = [graphic.geometry.envelope mutableCopy];
        
        if (featureSet.geometryType == AGSGeometryTypePoint)
        {
            NSLog(@"point type");
            float xMin = pt.x - 150.0;
            float yMin = pt.y - 150.0;
            float xMax = pt.x + 150.0;
            float yMax = pt.y + 150.0;
            AGSSpatialReference *sref = graphic.geometry.envelope.spatialReference;
            AGSEnvelope *envAlt = [AGSEnvelope envelopeWithXmin:xMin ymin:yMin xmax:xMax ymax:yMax spatialReference:sref];
            [self.mapView zoomToEnvelope:envAlt animated:YES];            
        }
        else
        {
            [env expandByFactor:1.3];
            [self.mapView zoomToEnvelope:env animated:YES];
        }
    }
}

Re: zoom to graphics layer selected

LucaAlferi1 — Fri, 06 Apr 2012 14:21:26 GMT

Sorry
i'm a beginner. How can i get geometry of graphics Layer?
Please an example code

Re: zoom to graphics layer selected

NimeshJarecha — Fri, 06 Apr 2012 15:16:59 GMT

Have a look at Graphics Sample.

Regards,
Nimesh

Re: zoom to graphics layer selected

NimeshJarecha — Tue, 10 Apr 2012 17:11:58 GMT

Luca,

If this issue is resolved then please mark thread as answered.

Regards,
Nimesh