Map spatial reference

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// Copyright 2016 Esri.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
// You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific
// language governing permissions and limitations under the License.

using System;
using Esri.ArcGISRuntime.Geometry;
using Esri.ArcGISRuntime.Mapping;
using Esri.ArcGISRuntime.UI.Controls;
using Foundation;
using UIKit;

namespace ArcGISRuntime.Samples.SetMapSpatialReference
{
    [Register("SetMapSpatialReference")]
    [ArcGISRuntime.Samples.Shared.Attributes.Sample(
        name: "Map spatial reference",
        category: "Map",
        description: "Specify a map's spatial reference.",
        instructions: "Pan and zoom around the map. Observe how the map is displayed using the World Bonne spatial reference.",
        tags: new[] { "WKID", "project" })]
    public class SetMapSpatialReference : UIViewController
    {
        // Hold references to UI controls.
        private MapView _myMapView;

        public SetMapSpatialReference()
        {
            Title = "Set map spatial reference";
        }

        private void Initialize()
        {
            // Create new Map using the World Bonne spatial reference (54024).
            Map myMap = new Map(SpatialReference.Create(54024));

            // Adding a map image layer which can reproject itself to the map's spatial reference.
            // Note: Some layer such as tiled layer cannot reproject and will fail to draw if their spatial
            // reference is not the same as the map's spatial reference.
            ArcGISMapImageLayer operationalLayer = new ArcGISMapImageLayer(new Uri(
                "https://sampleserver6.arcgisonline.com/arcgis/rest/services/SampleWorldCities/MapServer"));

            // Add operational layer to the Map.
            myMap.OperationalLayers.Add(operationalLayer);

            // Assign the map to the MapView.
            _myMapView.Map = myMap;
        }

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

        public override void LoadView()
        {
            // Create the views.
            View = new UIView() { BackgroundColor = ApplicationTheme.BackgroundColor };

            _myMapView = new MapView();
            _myMapView.TranslatesAutoresizingMaskIntoConstraints = false;

            // Add the views.
            View.AddSubviews(_myMapView);

            // Lay out the views.
            NSLayoutConstraint.ActivateConstraints(new[]
            {
                _myMapView.TopAnchor.ConstraintEqualTo(View.SafeAreaLayoutGuide.TopAnchor),
                _myMapView.BottomAnchor.ConstraintEqualTo(View.BottomAnchor),
                _myMapView.LeadingAnchor.ConstraintEqualTo(View.LeadingAnchor),
                _myMapView.TrailingAnchor.ConstraintEqualTo(View.TrailingAnchor)
            });
        }
    }
}