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Add a polygon annotation

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.

PolygonAnnotationExample.swift
import MapboxMaps
import UIKit
final class PolygonAnnotationExample: UIViewController, ExampleProtocol {
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()
// The below line is used for internal testing purposes only.
self.finish()
}.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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