Zoom to particular location in iOS ArcGIS

//Zooming to an initial envelope with the specified spatial reference of the map

AGSSpatialReference *sr = [AGSSpatialReference webMercatorSpatialReference];

    

AGSEnvelope *env = [AGSEnvelope envelopeWithXmin:-14631218.265139 ymin:8384478.275350 xmax:-9170290.964017 ymax:2245708.599438  spatialReference:sr];

    

[self.mapView zoomToEnvelope:env animated:YES];