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| 1 | +import UIKit |
| 2 | +import MapboxMaps |
| 3 | + |
| 4 | +final class EditPolygonExample: UIViewController, ExampleProtocol { |
| 5 | + private enum ID { |
| 6 | + static let polygonLayer = "editable-polygon-layer-id" |
| 7 | + static let geoJsonSource = "editable-geojson-source" |
| 8 | + } |
| 9 | + |
| 10 | + private var mapView: MapView! |
| 11 | + private var cancelables: Set<AnyCancelable> = [] |
| 12 | + |
| 13 | + private lazy var circleAnnotationsManager = mapView.annotations.makeCircleAnnotationManager() |
| 14 | + |
| 15 | + override func viewDidLoad() { |
| 16 | + super.viewDidLoad() |
| 17 | + |
| 18 | + let cameraOptions = CameraOptions( |
| 19 | + center: .helsinki, |
| 20 | + zoom: 3, |
| 21 | + bearing: 12) |
| 22 | + let options = MapInitOptions(cameraOptions: cameraOptions) |
| 23 | + mapView = MapView(frame: view.bounds, mapInitOptions: options) |
| 24 | + mapView.autoresizingMask = [.flexibleWidth, .flexibleHeight] |
| 25 | + |
| 26 | + view.addSubview(mapView) |
| 27 | + |
| 28 | + mapView.gestures.onMapTap.observe { [weak self] context in |
| 29 | + self?.dropPin(at: context.coordinate) |
| 30 | + }.store(in: &cancelables) |
| 31 | + |
| 32 | + mapView.mapboxMap.onStyleLoaded.observeNext { [weak self] _ in |
| 33 | + self?.dropPin(at: .helsinki) |
| 34 | + self?.dropPin(at: .kyiv) |
| 35 | + self?.dropPin(at: .berlin) |
| 36 | + }.store(in: &cancelables) |
| 37 | + } |
| 38 | + |
| 39 | + override func viewDidAppear(_ animated: Bool) { |
| 40 | + super.viewDidAppear(animated) |
| 41 | + // The below line is used for internal testing purposes only. |
| 42 | + finish() |
| 43 | + } |
| 44 | + |
| 45 | + private func dropPin(at coordinate: CLLocationCoordinate2D) { |
| 46 | + var newAnnotation = CircleAnnotation(centerCoordinate: coordinate) |
| 47 | + .circleColor(.random) |
| 48 | + .circleRadius(10) |
| 49 | + newAnnotation.isDraggable = true |
| 50 | + |
| 51 | + newAnnotation.dragBeginHandler = { (annotation, _) in |
| 52 | + annotation.circleRadius = 15 |
| 53 | + return true |
| 54 | + } |
| 55 | + newAnnotation.dragChangeHandler = { [weak self] (_, _) in |
| 56 | + self?.addOrEditPolygon() |
| 57 | + } |
| 58 | + newAnnotation.dragEndHandler = { (annotation, _) in |
| 59 | + annotation.circleRadius = 10 |
| 60 | + } |
| 61 | + |
| 62 | + circleAnnotationsManager.annotations.append(newAnnotation) |
| 63 | + addOrEditPolygon() |
| 64 | + } |
| 65 | + |
| 66 | + private func addOrEditPolygon() { |
| 67 | + if !circleAnnotationsManager.annotations.isEmpty { |
| 68 | + mapView.mapboxMap.setMapStyleContent { |
| 69 | + GeoJSONSource(id: ID.geoJsonSource) |
| 70 | + .data(.geometry(Polygon(outerRing: .init(coordinates: circleAnnotationsManager.annotations.map(\.point.coordinates))).geometry)) |
| 71 | + FillLayer(id: ID.polygonLayer, source: ID.geoJsonSource) |
| 72 | + .fillColor(.blue) |
| 73 | + .fillOpacity(0.3) |
| 74 | + .fillOutlineColor(.black) |
| 75 | + } |
| 76 | + } |
| 77 | + } |
| 78 | +} |
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