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import UIKit
import ArcGIS
class ViewController: UIViewController, AGSMapViewLayerDelegate {
@IBOutlet weak var mapView: AGSMapView!
let xmin = 29495.9472786567
let ymin = 39801.9418330241
let xmax = 30037.5707551916
let ymax = 40765.3094566208
override func viewDidLoad() {
// add base map
let url = NSURL(string: "")
let tiledLayer = AGSTiledMapServiceLayer(URL: url)
self.mapView.addMapLayer(tiledLayer, withName: "Basemap Tiled Layer")
self.mapView.layerDelegate = self
let envelope = AGSEnvelope(xmin: xmin, ymin: ymin, xmax: xmax, ymax: ymax, spatialReference: self.mapView.spatialReference);
self.mapView.zoomToEnvelope(envelope, animated: false)
func mapViewDidLoad(mapView:AGSMapView!){
NSNotificationCenter.defaultCenter().addObserver(self, selector: "responseToEventChanged:", name: AGSMapViewDidEndZoomingNotification, object: nil)
func responseToEventChanged(notification: NSNotification){
let theString = "xmin = \(mapView.visibleAreaEnvelope.xmin),\nymin = \(mapView.visibleAreaEnvelope.ymin),\nxmax = \(mapView.visibleAreaEnvelope.xmax),\nymax = \(mapView.visibleAreaEnvelope.ymax)"
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