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MapView Marker

This example shows how to add a marker on the NGLMapView.

  • User long-press to select points.

  • Add a marker on the NGLMapView

  • Provide delegate methods to set properties of the Marker, such as color and width.

  • Provide delegate methods to handle user gesture events, such as selecting and deselecting the marker.

  • Provide delegate method to customize the marker image


For all code examples, refer to Maps Code Examples

MarkerViewController view source

1import Foundation
2import UIKit
3import Nbmap
5class MarkerViewController: UIViewController {
6 var nbMapView: NGLMapView! {
7 didSet {
8 oldValue?.removeFromSuperview()
9 if let mapView = nbMapView {
10 configureMapView(mapView)
11 view.insertSubview(mapView, at: 0)
12 mapView.delegate = self
13 }
14 }
15 }
17 var points : Array = [CLLocationCoordinate2D]()

The code provided is an implementation of a MarkerViewController that manages a map view with custom marker annotations. Here's a summary of the code:

Initialization of MapView: The code initializes an instance of NGLMapView and assigns it to the nbMapView property. The map view is configured with flexible width and height, added as a subview to the view controller's view, and the map view's delegate is set to the view controller.

Custom Marker View:

  • The code provides functionality for adding custom markers to the map view. When the user taps on the map view, a marker is added at the tapped location. The existing markers are removed before adding the new marker. Each marker is represented by an NGLPointAnnotation object with a title, subtitle, and coordinate.

  • The maker's image is set using the imageFor annotation delegate method, which returns a custom marker image. The code also includes delegate methods for handling events related to marker selection and callout views.

    • mapView(_:didFinishLoading:): Called when the map view finishes loading its style. It sets the initial camera position using an NGLMapCamera.

    • mapView(_:didDeselect:): Called when one of the annotations is deselected.

    • mapView(_:didSelect:): Called when one of the annotation views is selected.

    • mapView(_:imageFor:): Returns an NGLAnnotationImage to display for the given annotation. In this case, it returns a marker image with a specific identifier.

    • mapView(_:annotationCanShowCallout:): Returns a Boolean indicating whether the annotation should show a callout.

    • mapView(_:calloutViewFor:): Returns a custom callout view to display for the given annotation.

    • mapView(_:leftCalloutAccessoryViewFor:): Returns the left accessory view for the standard callout bubble.

    • mapView(_:rightCalloutAccessoryViewFor:): Returns the right accessory view for the standard callout bubble.

    • mapView(_:calloutAccessoryControlTapped:): Called when the user taps on an accessory control in the annotation's callout view.

    • mapView(_:tapOnCalloutFor:): Called when the user taps on the body of the callout view.

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