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zoom to graphics layer selected

LucaAlferi1

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

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Accepted answers

NimeshJarecha

Have a look at Graphics Sample.

Regards,
Nimesh

All comments

NimeshJarecha

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

Regards,
Nimesh

JerryChapman

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];
        }
    }
}

LucaAlferi1

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

NimeshJarecha

Have a look at Graphics Sample.

Regards,
Nimesh

NimeshJarecha

Luca,

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

Regards,
Nimesh

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