1 files changed, 50 insertions, 0 deletions
diff --git a/platform/ios/demo/Examples/Swift/SourceCustomRasterExample.swift b/platform/ios/demo/Examples/Swift/SourceCustomRasterExample.swift
new file mode 100644
index 0000000000..fcac98c65e
--- /dev/null
+++ b/platform/ios/demo/Examples/Swift/SourceCustomRasterExample.swift
@@ -0,0 +1,50 @@
+import Mapbox
+
+@objc(SourceCustomRasterExample_Swift)
+
+class SourceCustomRasterExample_Swift: UIViewController, MGLMapViewDelegate {
+    var mapView: MGLMapView!
+    var rasterLayer: MGLRasterStyleLayer?
+
+    override func viewDidLoad() {
+        super.viewDidLoad()
+
+        mapView = MGLMapView(frame: view.bounds)
+        mapView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
+
+        mapView.setCenter(CLLocationCoordinate2D(latitude: 45.5188, longitude: -122.6748), zoomLevel: 13, animated: false)
+
+        mapView.delegate = self
+
+        view.addSubview(mapView)
+
+        // Add a UISlider that will control the raster layer’s opacity.
+        addSlider()
+    }
+
+    func mapView(_ mapView: MGLMapView, didFinishLoading style: MGLStyle) {
+        // Add a new raster source and layer.
+        let source = MGLRasterSource(identifier: "stamen-watercolor", tileURLTemplates: ["https://stamen-tiles.a.ssl.fastly.net/watercolor/{z}/{x}/{y}.jpg"], options: [ .tileSize: 256 ])
+        let rasterLayer = MGLRasterStyleLayer(identifier: "stamen-watercolor", source: source)
+
+        style.addSource(source)
+        style.addLayer(rasterLayer)
+
+        self.rasterLayer = rasterLayer
+    }
+    
+    func updateLayerOpacity(_ sender: UISlider) {
+        rasterLayer?.rasterOpacity = MGLStyleValue(rawValue: NSNumber(value: sender.value))
+    }
+
+    func addSlider() {
+        let padding: CGFloat = 10
+        let slider = UISlider(frame: CGRect(x: padding, y: self.view.frame.size.height - 44 - 30, width: self.view.frame.size.width - padding *  2, height: 44))
+        slider.autoresizingMask = [.flexibleTopMargin, .flexibleLeftMargin, .flexibleRightMargin]
+        slider.minimumValue = 0
+        slider.maximumValue = 1
+        slider.value = 1
+        slider.addTarget(self, action: #selector(updateLayerOpacity), for: .valueChanged)
+        view.addSubview(slider)
+    }
+}