Add a polygon annotation | Maps SDK | iOS

Add a polygon annotation to the map.

There are several ways to add markers, annotations, and other shapes to the map using the Maps SDK. To choose the best approach for your application, read the Markers and annotations guide.

Swift

PolygonAnnotationExample.swift

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import MapboxMaps
import UIKit

final class ViewController: UIViewController {
    private var mapView: MapView!
    private var cancelables = Set<AnyCancelable>()

    override func viewDidLoad() {
        super.viewDidLoad()

        let centerCoordinate = CLLocationCoordinate2D(latitude: 25.04579, longitude: -88.90136)
        let options = MapInitOptions(cameraOptions: CameraOptions(center: centerCoordinate, zoom: 5.0))

        mapView = MapView(frame: view.bounds, mapInitOptions: options)
        mapView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
        view.addSubview(mapView)

        // Allows the delegate to receive information about map events.
        mapView.mapboxMap.onMapLoaded.observeNext { _ in
            self.setupExample()

            
            
        }.store(in: &cancelables)
    }

    // Wait for the map to load before adding an annotation.
    private func setupExample() {

        // Create the PolygonAnnotationManager
        // Annotation managers are kept alive by `AnnotationOrchestrator`
        // (`mapView.annotations`) until you explicitly destroy them
        // by calling `mapView.annotations.removeAnnotationManager(withId:)`
        let polygonAnnotationManager = mapView.annotations.makePolygonAnnotationManager()

        // Create the polygon annotation
        var polygonAnnotation = PolygonAnnotation(polygon: makePolygon())

        // Style the polygon annotation
        polygonAnnotation.fillColor = StyleColor(.red)
        polygonAnnotation.fillOpacity = 0.8

        // Enable the polygon annotation to be dragged
        polygonAnnotation.isDraggable = true

        polygonAnnotation.tapHandler = { _ in
            print("polygon is tapped")
            return true
        }

        // Add the polygon annotation to the manager
        polygonAnnotationManager.annotations = [polygonAnnotation]
    }

    private func makePolygon() -> Polygon {

        // Describe the polygon's geometry
        let outerRingCoords = [
            CLLocationCoordinate2DMake(24.51713945052515, -89.857177734375),
            CLLocationCoordinate2DMake(24.51713945052515, -87.967529296875),
            CLLocationCoordinate2DMake(26.244156283890756, -87.967529296875),
            CLLocationCoordinate2DMake(26.244156283890756, -89.857177734375),
            CLLocationCoordinate2DMake(24.51713945052515, -89.857177734375)
        ]

        // This polygon has an intererior polygon which represents a hole in the shape.
        let innerRingCoords = [
            CLLocationCoordinate2DMake(25.085598897064752, -89.20898437499999),
            CLLocationCoordinate2DMake(25.085598897064752, -88.61572265625),
            CLLocationCoordinate2DMake(25.720735134412106, -88.61572265625),
            CLLocationCoordinate2DMake(25.720735134412106, -89.20898437499999),
            CLLocationCoordinate2DMake(25.085598897064752, -89.20898437499999)
        ]

        /// Create the Polygon with the outer ring and inner ring
        let outerRing = Ring(coordinates: outerRingCoords)
        let innerRing = Ring(coordinates: innerRingCoords)

        return Polygon(outerRing: outerRing, innerRings: [innerRing])
    }
}

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