Add a polygon annotation

import Mapbox
class ViewController: UIViewController, MGLMapViewDelegate {
var mapView: MGLMapView!
override func viewDidLoad() {
super.viewDidLoad()
mapView = MGLMapView(frame: view.bounds)
mapView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
mapView.setCenter(CLLocationCoordinate2D(latitude: 45.520486, longitude: -122.673541), zoomLevel: 11, animated: false)
view.addSubview(mapView)
mapView.delegate = self
}
override func viewDidAppear(_ animated: Bool) {
// Draw the polygon after the map has initialized
drawShape()
}
func drawShape() {
// Create a coordinates array to hold all of the coordinates for our shape.
var coordinates = [
CLLocationCoordinate2D(latitude: 45.522585, longitude: -122.685699),
CLLocationCoordinate2D(latitude: 45.534611, longitude: -122.708873),
CLLocationCoordinate2D(latitude: 45.530883, longitude: -122.678833),
CLLocationCoordinate2D(latitude: 45.547115, longitude: -122.667503),
CLLocationCoordinate2D(latitude: 45.530643, longitude: -122.660121),
CLLocationCoordinate2D(latitude: 45.533529, longitude: -122.636260),
CLLocationCoordinate2D(latitude: 45.521743, longitude: -122.659091),
CLLocationCoordinate2D(latitude: 45.510677, longitude: -122.648792),
CLLocationCoordinate2D(latitude: 45.515008, longitude: -122.664070),
CLLocationCoordinate2D(latitude: 45.502496, longitude: -122.669048),
CLLocationCoordinate2D(latitude: 45.515369, longitude: -122.678489),
CLLocationCoordinate2D(latitude: 45.506346, longitude: -122.702007),
CLLocationCoordinate2D(latitude: 45.522585, longitude: -122.685699)
]
let shape = MGLPolygon(coordinates: &coordinates, count: UInt(coordinates.count))
mapView.addAnnotation(shape)
}
func mapView(_ mapView: MGLMapView, alphaForShapeAnnotation annotation: MGLShape) -> CGFloat {
return 0.5
}
func mapView(_ mapView: MGLMapView, strokeColorForShapeAnnotation annotation: MGLShape) -> UIColor {
return .white
}
func mapView(_ mapView: MGLMapView, fillColorForPolygonAnnotation annotation: MGLPolygon) -> UIColor {
return UIColor(red: 59/255, green: 178/255, blue: 208/255, alpha: 1)
}
}