1 files changed, 60 insertions, 0 deletions
diff --git a/platform/ios/demo/Examples/Swift/BlockingGesturesDelegateExample.swift b/platform/ios/demo/Examples/Swift/BlockingGesturesDelegateExample.swift
new file mode 100644
index 0000000000..45fb2ef340
--- /dev/null
+++ b/platform/ios/demo/Examples/Swift/BlockingGesturesDelegateExample.swift
@@ -0,0 +1,60 @@
+import Mapbox
+
+@objc(BlockingGesturesDelegateExample_Swift)
+
+class BlockingGesturesDelegateExample_Swift: UIViewController, MGLMapViewDelegate {
+    
+    private var colorado: MGLCoordinateBounds!
+    
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        
+        let mapView = MGLMapView(frame: view.bounds)
+        mapView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
+        mapView.delegate = self
+        
+        // Denver, Colorado
+        let center = CLLocationCoordinate2D(latitude: 39.748947, longitude: -104.995882)
+        
+        // Starting point
+        mapView.setCenter(center, zoomLevel: 10, direction: 0, animated: false)
+        
+        // Colorado's bounds
+        let ne = CLLocationCoordinate2D(latitude: 40.989329, longitude: -102.062592)
+        let sw = CLLocationCoordinate2D(latitude: 36.986207, longitude: -109.049896)
+        colorado = MGLCoordinateBounds(sw: sw, ne: ne)
+        
+        view.addSubview(mapView)
+
+    }
+    
+    // This example uses Colorado's boundaries to restrict
+    // the camera movement.
+    
+    func mapView(_ mapView: MGLMapView, shouldChangeFrom oldCamera: MGLMapCamera, to newCamera: MGLMapCamera) -> Bool {
+        
+        // Get the current camera to restore it after
+        let currentCamera = mapView.camera
+        
+        // From the new camera obtain the center to test
+        // if it's inside the boundaries
+        let newCameraCenter = newCamera.centerCoordinate
+        
+
+        // Set mapView to newCamera to project the
+        // new boundaries
+        mapView.camera = newCamera
+        let newVisibleCoordinates = mapView.visibleCoordinateBounds
+        
+        // Revert the camera
+        mapView.camera = currentCamera
+
+        // Test if the newCameraCenter and newVisibleCoordinates
+        // are inside self.colorado
+        let inside = MGLCoordinateInCoordinateBounds(newCameraCenter, self.colorado)
+        let intersects = MGLCoordinateInCoordinateBounds(newVisibleCoordinates.ne, self.colorado) && MGLCoordinateInCoordinateBounds(newVisibleCoordinates.sw, self.colorado)
+        
+        return inside && intersects
+
+    }
+}