C# CLLocationCoordinate2D类代码示例

			public BasicPinAnnotation (CLLocationCoordinate2D coordinate, string title, string subtitle, string imageAdress) 
			{
				this.Coords = coordinate;
				this.title = title;
				this.subtitle = subtitle;
				this.imageAdress = imageAdress;
			}

 public FieldMapAnnotation(Field field)
 {
     coordinate = new CLLocationCoordinate2D(GeoHelper.CalculateCenter(field.BoundingCoordinates).Latitude, GeoHelper.CalculateCenter(field.BoundingCoordinates).Longitude);
     Field = field;
     title = field.Name;
     subtitle = string.Format("Number of blocks: {0}", field.Blocks.Count);
 }

		public override void ViewDidLoad ()
		{
			base.ViewDidLoad ();
			
			Title = "MapView";
			
			mapView = new MKMapView(View.Bounds);	
			mapView.AutoresizingMask = UIViewAutoresizing.FlexibleDimensions;		
			//mapView.MapType = MKMapType.Standard;	// this is the default
			//mapView.MapType = MKMapType.Satellite;
			//mapView.MapType = MKMapType.Hybrid;
			View.AddSubview(mapView);

			// create our location and zoom 
			//CLLocationCoordinate2D coords = new CLLocationCoordinate2D(40.77, -73.98); // new york
			//CLLocationCoordinate2D coords = new CLLocationCoordinate2D(33.93, -118.40); // los angeles
			//CLLocationCoordinate2D coords = new CLLocationCoordinate2D(51.509, -0.1); // london
			CLLocationCoordinate2D coords = new CLLocationCoordinate2D(48.857, 2.351); // paris

			MKCoordinateSpan span = new MKCoordinateSpan(MilesToLatitudeDegrees(20), MilesToLongitudeDegrees(20, coords.Latitude));
			
			// set the coords and zoom on the map
			mapView.Region = new MKCoordinateRegion(coords, span);

		}

 /// <summary>
 /// custom constructor
 /// </summary>
 public ConferenceAnnotation(CLLocationCoordinate2D coord, string t, string s)
     : base()
 {
     _coordinate=coord;
      	_title=t;
     _subtitle=s;
 }

 public ExtendedMapAnnotation(CLLocationCoordinate2D coordinate, string title, string subtitle, string pinIcon)
 {
   _coordinate = coordinate;
   _title = title;
   _subtitle = subtitle;
   _pinIcon = pinIcon;
 }

        public void LoadMarkers()
        {
            CLLocationCoordinate2D coord;

            string[] coordList = ReadGPSCoords ();

            foreach (string s in coordList) {

                if (string.IsNullOrEmpty (s) == false) {

                    string[] coordPair = s.Split(',');

                    if (coordPair.Length > 0) {

                        var longitude = coordPair [0];
                        var lat = coordPair [1];

                        coord = new CLLocationCoordinate2D ( Convert.ToDouble(lat), Convert.ToDouble(longitude));
                        var marker = Marker.FromPosition (coord);
                        marker.Map = mapView;
                    }

                }

            }
        }

		public override void ViewDidLoad ()
		{
			base.ViewDidLoad ();
			
			// Perform any additional setup after loading the view, typically from a nib.

			//change map type and show user location
			//mapView.MapType = MonoTouch.MapKit.MKMapType.Hybrid;
			mapView.ShowsUserLocation = true;

			//set map center and region
			double lat = 45.8149;
			double lon = 15.9785;
			var mapCenter = new CLLocationCoordinate2D (lat,lon);
			var mapRegion = MKCoordinateRegion.FromDistance (mapCenter, 2000, 2000);
			mapView.CenterCoordinate = mapCenter;
			mapView.Region = mapRegion;


			//set the map delegate -> callback
			//mapView will call this when something needs to be done (extras ...)
			MapViewDelegate mvd = new MapViewDelegate();
			mapView.Delegate = mvd;

			//It's important that the map delegate is created before annotations!!
			//add an annotation MKPointAnnotation -> basic class
			mapView.AddAnnotation (new MKPointAnnotation (){Title="MyAnnotation",Coordinate = new CLLocationCoordinate2D(45.8100,15.9760)});
			//add an annotation MyCustomAnnotation -> custom class
			mapView.AddAnnotation (new MyCustomAnnotation("HolisticWare","www.holisticware.com",new CLLocationCoordinate2D(45.8090,15.9710)));

			//add an overlay
			var circleOverlay = MKCircle.Circle (mapCenter, 1000);
			mapView.AddOverlay (circleOverlay);

		}

 public RestaurantAnnotation (string title, string subtitle, CLLocationCoordinate2D coordinate, RestaurantKind kind)
 {
     _title = title;
     _subtitle = subtitle;
     _coordinate = coordinate;
     _kind = kind;
 }

        public override void ViewDidLoad()
        {
            Console.WriteLine("Map to load");
            base.ViewDidLoad ();

            Title = "MapView";

            //mapView = new MKMapView(View.Bounds);
            this.DDZMapView.AutoresizingMask = UIViewAutoresizing.FlexibleDimensions;
            //this.DDZMapView.MapType = MKMapType.Standard;	// this is the default
            //this.DDZMapView.MapType = MKMapType.Satellite;
            //this.DDZMapView.MapType = MKMapType.Hybrid;
            View.AddSubview(this.DDZMapView);

            // create our location and zoom
            CLLocationCoordinate2D coords = new CLLocationCoordinate2D(38.9686111, -77.3413889); // Reston
            MKCoordinateSpan span = new MKCoordinateSpan(MilesToLatitudeDegrees(2), MilesToLongitudeDegrees(2, coords.Latitude));

            // set the coords and zoom on the map
            this.DDZMapView.Region = new MKCoordinateRegion(coords, span);

            circleOverlay = MKCircle.Circle (coords, 200);
            this.DDZMapView.AddOverlay (circleOverlay);

            this.DDZMapView.GetViewForOverlay = (m, o) => {
                if(circleView == null)
                {
                    circleView = new MKCircleView(o as MKCircle);
                    circleView.FillColor = UIColor.Purple;
                    circleView.Alpha = 0.5f;
                }
                return circleView;
            };
        }

        public override void ViewDidLoad ()
        {
            base.ViewDidLoad ();

            // change map type and show user location
            map.MapType = MKMapType.Hybrid;
            map.ShowsUserLocation = true;

            // set map center and region
            double lat = 42.374260;
            double lon = -71.120824;
            var mapCenter = new CLLocationCoordinate2D (lat, lon);
            var mapRegion = MKCoordinateRegion.FromDistance (mapCenter, 2000, 2000);
            map.CenterCoordinate = mapCenter;
            map.Region = mapRegion;

            // add an annotation
            map.AddAnnotation (new MKPointAnnotation (){Title="MyAnnotation", Coordinate = new CLLocationCoordinate2D (42.364260, -71.120824)});

            // set the map delegate
            mapDel = new MyMapDelegate ();
            map.Delegate = mapDel;

            // add a custom annotation
            map.AddAnnotation (new MonkeyAnnotation ("Xamarin", mapCenter));

            // add an overlay
            var circleOverlay = MKCircle.Circle (mapCenter, 1000);
            map.AddOverlay (circleOverlay);
        }

		public override void ViewDidLoad ()
		{
			base.ViewDidLoad ();
			
			Title = "Highland Park, Los Angeles";
			
			// create our location and zoom for los angeles
			CLLocationCoordinate2D coords = new CLLocationCoordinate2D (34.120, -118.188);
			MKCoordinateSpan span = new MKCoordinateSpan(MilesToLatitudeDegrees (20), MilesToLongitudeDegrees (20, coords.Latitude));

			// set the coords and zoom on the map
			mapMain.Region = new MKCoordinateRegion (coords, span);
			
			// set our delegate. we don't actually need a delegate if we want to just drop a pin
			// on there, but if we want to specify anything custom, we do
			mapMain.Delegate = new MapDelegate();
			
			// add a basic annotation
			mapMain.AddAnnotation (new BasicMapAnnotation (new CLLocationCoordinate2D (34.120, -118.188), "Los Angeles", "City of Demons"));
			
			// can use this as well.
//			mapMain.AddAnnotationObject(
//				new BasicMapAnnotationProto() { Coordinate = new CLLocationCoordinate2D(34.120, -118.188), Title = "Los Angeles", Subtitle = "City of Demons" }
//			);
		}

        protected override void OnElementChanged(ElementChangedEventArgs<View> e)
        {
            base.OnElementChanged (e);

            if (e.OldElement != null) {
                var nativeMap = Control as MKMapView;
                nativeMap.OverlayRenderer = null;
            }

            if (e.NewElement != null) {
                var formsMap = (CustomMap)e.NewElement;
                var nativeMap = Control as MKMapView;

                nativeMap.OverlayRenderer = GetOverlayRenderer;

                CLLocationCoordinate2D[] coords = new CLLocationCoordinate2D[formsMap.ShapeCoordinates.Count];

                int index = 0;
                foreach (var position in formsMap.ShapeCoordinates) {
                    coords [index] = new CLLocationCoordinate2D (position.Latitude, position.Longitude);
                    index++;
                }

                var blockOverlay = MKPolygon.FromCoordinates (coords);
                nativeMap.AddOverlay (blockOverlay);
            }
        }

		public HouseMapAnnotation (CLLocationCoordinate2D coordinate, string title, House house, string rank) {
			this.coordinate = coordinate;
			this.title = title;
			this.House = house;
			this.subtitle = string.Format ("({0}) Likes",house.Likes);
			this.Rank = rank;
		}

		public override void ViewDidLoad ()
		{
			base.ViewDidLoad ();
			
			this.Title = "Pyramids of Giza";
			
			// create our location and zoom for the pyramids.
			CLLocationCoordinate2D coords = new CLLocationCoordinate2D(29.976111, 31.132778);
			MKCoordinateSpan span = new MKCoordinateSpan(MilesToLatitudeDegrees(.75), MilesToLongitudeDegrees(.75, coords.Latitude));

			// set the coords and zoom on the map
			this.mapMain.Region = new MKCoordinateRegion(coords, span);
			
			// show the sat view.
			this.mapMain.MapType = MKMapType.Satellite;
			
			// add an overlay with the coords
			this._circleOverlay = MKCircle.Circle(coords, 200);
			this.mapMain.AddOverlay(this._circleOverlay);
						
			// set our delegate.
			//this.mapMain.Delegate = new MapDelegate();
			
			//-- OR --
			//- override the GetVIewForOverlay directly, in which case we don't need a delegate
			this.mapMain.GetViewForOverlay += (m, o) => {
				if(this._circleView == null)
				{
					this._circleView = new MKCircleView(this._circleOverlay);
					this._circleView.FillColor = UIColor.Blue;
					this._circleView.Alpha = 0.5f;
				}
				return this._circleView;
			};
		}

        public override void ViewDidLoad()
        {
            base.ViewDidLoad ();

            Title = "Mi Ubicacion";

            mapView = new MKMapView(View.Bounds);
            mapView.AutoresizingMask = UIViewAutoresizing.FlexibleDimensions;
            //mapView.MapType = MKMapType.Standard;	// this is the default
            //mapView.MapType = MKMapType.Satellite;
            mapView.MapType = MKMapType.Hybrid;
            mapView.ZoomEnabled = true;
            View.AddSubview(mapView);

            // this is all that's required to show the blue dot indicating user-location
            mapView.ShowsUserLocation = true;

            Console.WriteLine ("initial loc:"+mapView.UserLocation.Coordinate.Latitude + "," + mapView.UserLocation.Coordinate.Longitude);

            mapView.DidUpdateUserLocation += (sender, e) => {
                if (mapView.UserLocation != null) {
                    Console.WriteLine ("userloc:"+mapView.UserLocation.Coordinate.Latitude + "," + mapView.UserLocation.Coordinate.Longitude);
                    CLLocationCoordinate2D coords = mapView.UserLocation.Coordinate;
                    MKCoordinateSpan span = new MKCoordinateSpan(MilesToLatitudeDegrees(1), MilesToLongitudeDegrees(1, coords.Latitude));
                    mapView.Region = new MKCoordinateRegion(coords, span);
                }
            };

            if (!mapView.UserLocationVisible) {
                // user denied permission, or device doesn't have GPS/location ability
                Console.WriteLine ("userloc not visible, show cupertino");
                CLLocationCoordinate2D coords = new CLLocationCoordinate2D(37.33233141,-122.0312186); // cupertino
                MKCoordinateSpan span = new MKCoordinateSpan(MilesToLatitudeDegrees(20), MilesToLongitudeDegrees(20, coords.Latitude));
                mapView.Region = new MKCoordinateRegion(coords, span);
            }

            int typesWidth=260, typesHeight=30, distanceFromBottom=60;
            mapTypes = new UISegmentedControl(new RectangleF((View.Bounds.Width-typesWidth)/2, View.Bounds.Height-distanceFromBottom, typesWidth, typesHeight));
            mapTypes.InsertSegment("Mapa", 0, false);
            mapTypes.InsertSegment("Satelite", 1, false);
            mapTypes.InsertSegment("Hibrido", 2, false);
            mapTypes.SelectedSegment = 0; // Road is the default
            mapTypes.AutoresizingMask = UIViewAutoresizing.FlexibleTopMargin;
            mapTypes.ValueChanged += (s, e) => {
                switch(mapTypes.SelectedSegment) {
                case 0:
                    mapView.MapType = MKMapType.Standard;
                    break;
                case 1:
                    mapView.MapType = MKMapType.Satellite;
                    break;
                case 2:
                    mapView.MapType = MKMapType.Hybrid;
                    break;
                }
            };

            View.AddSubview(mapTypes);
        }