All docschevron-rightMaps SDK for iOSchevron-rightarrow-leftExampleschevron-rightAdd markers to a map

Add markers to a map

Add markers that use different icons.

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.

AddMarkersSymbolExample.swift
import UIKit
import MapboxMaps
final class AddMarkersSymbolExample: UIViewController, ExampleProtocol {
private var mapView: MapView!
private var cancelables = Set<AnyCancelable>()
override func viewDidLoad() {
super.viewDidLoad()
let centerCoordinate = CLLocationCoordinate2D(latitude: 55.70651, longitude: 12.554729)
let options = MapInitOptions(cameraOptions: CameraOptions(center: centerCoordinate, zoom: 8))
mapView = MapView(frame: view.bounds, mapInitOptions: options)
mapView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
view.addSubview(mapView)
mapView.mapboxMap.onMapLoaded.observeNext { [weak self] _ in
guard let self = self else { return }
self.prepareStyle()
// The following line is just for testing purposes.
self.finish()
}.store(in: &cancelables)
mapView.mapboxMap.styleURI = .streets
}
// MARK: - Style management
private func prepareStyle() {
try? mapView.mapboxMap.addImage(UIImage(named: "intermediate-pin")!, id: Constants.BLUE_ICON_ID)
try? mapView.mapboxMap.addImage(UIImage(named: "dest-pin")!, id: Constants.RED_ICON_ID)
var features = [Feature]()
var feature = Feature(geometry: Point(LocationCoordinate2D(latitude: 55.608166, longitude: 12.65147)))
feature.properties = [Constants.ICON_KEY: .string(Constants.BLUE_MARKER_PROPERTY)]
features.append(feature)
var feature1 = Feature(geometry: Point(LocationCoordinate2D(latitude: 55.70651, longitude: 12.554729)))
feature1.properties = [Constants.ICON_KEY: .string(Constants.RED_MARKER_PROPERTY)]
features.append(feature1)
var source = GeoJSONSource(id: Constants.SOURCE_ID)
source.data = .featureCollection(FeatureCollection(features: features))
try? mapView.mapboxMap.addSource(source)
let rotateExpression = Exp(.match) {
Exp(.get) { Constants.ICON_KEY }
Constants.BLUE_MARKER_PROPERTY
45
0
}
let imageExpression = Exp(.match) {
Exp(.get) { Constants.ICON_KEY }
Constants.BLUE_MARKER_PROPERTY
Constants.BLUE_ICON_ID
Constants.RED_MARKER_PROPERTY
Constants.RED_ICON_ID
Constants.RED_ICON_ID
}
var layer = SymbolLayer(id: Constants.LAYER_ID, source: Constants.SOURCE_ID)
layer.iconImage = .expression(imageExpression)
layer.iconAnchor = .constant(.bottom)
layer.iconAllowOverlap = .constant(false)
layer.iconRotate = .expression(rotateExpression)
// Add Y-offset so icon will point to exact location.
layer.iconOffset = .constant([0, 12])
try? mapView.mapboxMap.addLayer(layer)
}
}
extension AddMarkersSymbolExample {
private enum Constants {
static let ICON_KEY = "icon_key"
static let BLUE_MARKER_PROPERTY = "icon_blue_property"
static let RED_MARKER_PROPERTY = "icon_red_property"
static let BLUE_ICON_ID = "blue"
static let RED_ICON_ID = "red"
static let SOURCE_ID = "source_id"
static let LAYER_ID = "layer_id"
}
}
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