1 files changed, 59 insertions, 0 deletions
diff --git a/platform/ios/demo/Examples/Swift/DDSCircleLayerExample.swift b/platform/ios/demo/Examples/Swift/DDSCircleLayerExample.swift
new file mode 100644
index 0000000000..dc8a7066d9
--- /dev/null
+++ b/platform/ios/demo/Examples/Swift/DDSCircleLayerExample.swift
@@ -0,0 +1,59 @@
+import Mapbox
+
+@objc(DDSCircleLayerExample_Swift)
+
+class DDSCircleLayerExample_Swift: UIViewController, MGLMapViewDelegate {
+    
+    var mapView: MGLMapView!
+    
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        
+        // Create a new map view using the Mapbox Light style.
+        mapView = MGLMapView(frame: view.bounds)
+        mapView.styleURL = MGLStyle.lightStyleURL(withVersion: 9)
+        mapView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
+        mapView.tintColor = .darkGray
+        
+        // Set the map’s center coordinate and zoom level.
+        mapView.setCenter(CLLocationCoordinate2D(latitude: 38.897, longitude: -77.039), animated: false)
+        mapView.zoomLevel = 10.5
+
+        mapView.delegate = self
+        view.addSubview(mapView)
+    }
+    
+    // Wait until the style is loaded before modifying the map style.
+    func mapView(_ mapView: MGLMapView, didFinishLoading style: MGLStyle) {
+        
+        // "mapbox://examples.2uf7qges" is a map ID referencing a tileset. For more
+        // more information, see mapbox.com/help/define-map-id/
+        let source = MGLVectorSource(identifier: "trees", configurationURL: URL(string: "mapbox://examples.2uf7qges")!)
+
+        style.addSource(source)
+
+        let layer = MGLCircleStyleLayer(identifier: "tree-style", source: source)
+
+        // The source name from the source's TileJSON metadata: mapbox.com/api-documentation/#retrieve-tilejson-metadata
+        layer.sourceLayerIdentifier = "yoshino-trees-a0puw5"
+        
+        // Stops based on age of tree in years.
+        let stops = [
+          0: MGLStyleValue(rawValue: UIColor(red:1.00, green:0.72, blue:0.85, alpha:1.0)),
+          2: MGLStyleValue(rawValue: UIColor(red:0.69, green:0.48, blue:0.73, alpha:1.0)),
+          4: MGLStyleValue(rawValue: UIColor(red:0.61, green:0.31, blue:0.47, alpha:1.0)),
+          7: MGLStyleValue(rawValue: UIColor(red:0.43, green:0.20, blue:0.38, alpha:1.0)),
+          16: MGLStyleValue(rawValue: UIColor(red:0.33, green:0.17, blue:0.25, alpha:1.0))
+        ]
+        
+        // Style the circle layer color based on the above categorical stops
+        layer.circleColor = MGLStyleValue<UIColor>(interpolationMode: .interval,
+            sourceStops: stops,
+            attributeName: "AGE",
+            options: nil)
+        
+        layer.circleRadius = MGLStyleValue(rawValue: 3)
+        
+        style.addLayer(layer)
+    }
+}