Advanced navigation app

import UIKit
import MapboxCoreNavigation
import MapboxNavigation
import MapboxDirections
import Mapbox
class AdvancedViewController: UIViewController, MGLMapViewDelegate, CLLocationManagerDelegate, NavigationMapViewDelegate, NavigationViewControllerDelegate {
var mapView: NavigationMapView?
var currentRoute: Route? {
get {
return routes?.first
}
set {
guard let selected = newValue else { routes?.remove(at: 0); return }
guard let routes = routes else { self.routes = [selected]; return }
self.routes = [selected] + routes.filter { $0 != selected }
}
}
var routes: [Route]? {
didSet {
guard let routes = routes, let current = routes.first else { mapView?.removeRoutes(); return }
mapView?.showRoutes(routes)
mapView?.showWaypoints(current)
}
}
var startButton: UIButton?
var locationManager = CLLocationManager()
private typealias RouteRequestSuccess = (([Route]) -> Void)
private typealias RouteRequestFailure = ((NSError) -> Void)
//MARK: - Lifecycle Methods
override func viewDidLoad() {
super.viewDidLoad()
locationManager.delegate = self
locationManager.requestWhenInUseAuthorization()
mapView = NavigationMapView(frame: view.bounds)
mapView?.autoresizingMask = [.flexibleWidth, .flexibleHeight]
mapView?.userTrackingMode = .follow
mapView?.delegate = self
mapView?.navigationMapViewDelegate = self
let gesture = UILongPressGestureRecognizer(target: self, action: #selector(handleLongPress(_:)))
mapView?.addGestureRecognizer(gesture)
view.addSubview(mapView!)
startButton = UIButton()
startButton?.setTitle("Start Navigation", for: .normal)
startButton?.translatesAutoresizingMaskIntoConstraints = false
startButton?.backgroundColor = .blue
startButton?.contentEdgeInsets = UIEdgeInsets(top: 10, left: 20, bottom: 10, right: 20)
startButton?.addTarget(self, action: #selector(tappedButton(sender:)), for: .touchUpInside)
startButton?.isHidden = true
view.addSubview(startButton!)
startButton?.bottomAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.bottomAnchor, constant: -20).isActive = true
startButton?.centerXAnchor.constraint(equalTo: self.view.centerXAnchor).isActive = true
view.setNeedsLayout()
}
//overriding layout lifecycle callback so we can style the start button
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
startButton?.layer.cornerRadius = startButton!.bounds.midY
startButton?.clipsToBounds = true
startButton?.setNeedsDisplay()
}
@objc func tappedButton(sender: UIButton) {
guard let route = currentRoute else { return }
// For demonstration purposes, simulate locations if the Simulate Navigation option is on.
let navigationService = MapboxNavigationService(route: route, simulating: simulationIsEnabled ? .always : .onPoorGPS)
let navigationOptions = NavigationOptions(navigationService: navigationService)
let navigationViewController = NavigationViewController(for: route, options: navigationOptions)
navigationViewController.delegate = self
present(navigationViewController, animated: true, completion: nil)
}
@objc func handleLongPress(_ gesture: UILongPressGestureRecognizer) {
guard gesture.state == .ended else { return }
let spot = gesture.location(in: mapView)
guard let location = mapView?.convert(spot, toCoordinateFrom: mapView) else { return }
requestRoute(destination: location)
}
func requestRoute(destination: CLLocationCoordinate2D) {
guard let userLocation = mapView?.userLocation!.location else { return }
let userWaypoint = Waypoint(location: userLocation, heading: mapView?.userLocation?.heading, name: "user")
let destinationWaypoint = Waypoint(coordinate: destination)
let options = NavigationRouteOptions(waypoints: [userWaypoint, destinationWaypoint])
Directions.shared.calculate(options) { (waypoints, routes, error) in
guard let routes = routes else { return }
self.routes = routes
self.startButton?.isHidden = false
self.mapView?.showRoutes(routes)
self.mapView?.showWaypoints(self.currentRoute!)
}
}
// Delegate method called when the user selects a route
func navigationMapView(_ mapView: NavigationMapView, didSelect route: Route) {
self.currentRoute = route
}
}