Route initialization app

/*
This code example is part of the Mapbox Navigation SDK for iOS demo app,
which you can build and run: https://github.com/mapbox/mapbox-navigation-ios-examples
To learn more about each example in this app, including descriptions and links
to documentation, see our docs: https://docs.mapbox.com/ios/navigation/examples/route-initialization
*/
 
import UIKit
import MapboxCoreNavigation
import MapboxNavigation
import MapboxDirections
import Turf
 
class RouteInitializationViewController: UIViewController {
 
// MARK: - UIViewController lifecycle methods
 
override func viewDidLoad() {
super.viewDidLoad()
 
let origin: CLLocationCoordinate2D = CLLocationCoordinate2DMake(37.776818, -122.399076)
let destination: CLLocationCoordinate2D = CLLocationCoordinate2DMake(37.777407, -122.399814)
let distance: CLLocationDistance = 92.2
let expectedTravelTime: TimeInterval = 24.6
let routeCoordinates = [origin, destination]
let distanceAlongArrivalStep = 18.7
 
// Add two spoken instructions about an upcoming maneuver.
let departureSpokenInstruction = SpokenInstruction(distanceAlongStep: distance,
text: "Head northwest on 5th Street, then you have arrived at your destination",
ssmlText: "")
let arrivalSpokenInstruction = SpokenInstruction(distanceAlongStep: distanceAlongArrivalStep,
text: "You have arrived at your destination",
ssmlText: "")
 
// Add two instruction banners which give visual cue about a given `RouteStep`.
let departureVisualInstructionBanner = createVisualInstructionBanner(text: "You will arrive",
distanceAlongStep: distance)
let arrivalVisualInstructionBanner = createVisualInstructionBanner(text: "You have arrived",
distanceAlongStep: distanceAlongArrivalStep)
 
// For simplification RouteLeg contains only two steps: for departure and arrival.
let departureStep = createRouteStep(maneuverLocation: origin,
maneuverType: .depart,
instructions: "Head northwest on 5th Street",
distance: distance,
expectedTravelTime: expectedTravelTime,
instructionsSpokenAlongStep: [departureSpokenInstruction, arrivalSpokenInstruction],
instructionsDisplayedAlongStep: [departureVisualInstructionBanner, arrivalVisualInstructionBanner])
 
let departureStepCoordinates = [
origin,
CLLocationCoordinate2D(latitude: 37.777368, longitude: -122.399767),
destination
]
 
departureStep.shape = LineString(departureStepCoordinates)
 
let arrivalStep = createRouteStep(maneuverLocation: destination,
maneuverType: .arrive,
instructions: "You have arrived at your destination",
distance: 0,
expectedTravelTime: 0)
arrivalStep.shape = LineString([destination])
 
let routeLeg = RouteLeg(steps: [departureStep, arrivalStep],
name: "5th Street",
distance: distance,
expectedTravelTime: expectedTravelTime,
profileIdentifier: .automobile)
let routeOptions = NavigationRouteOptions(coordinates: routeCoordinates)
routeLeg.source = routeOptions.waypoints[0]
routeLeg.destination = routeOptions.waypoints[1]
 
// It's also possible to configure `RouteLeg` with information related to traffic congestion, expected travel time etc.
routeLeg.segmentCongestionLevels = [
.heavy,
.low,
.low,
.moderate
]
 
routeLeg.expectedSegmentTravelTimes = [
20.6,
2,
1.1,
0.9
]
 
// Here `Route` object is created manually without calling Directions API directly.
let route = Route(legs: [routeLeg], shape: LineString(routeCoordinates), distance: distance, expectedTravelTime: expectedTravelTime)
// Route response encapsulates more data about the route. Since this example doesn't call Directions API, we should add it manually.
let routeResponse = RouteResponse(httpResponse: nil,
identifier: "your-custom-id-here",
routes: [route],
waypoints: routeCoordinates.map {
Waypoint(coordinate: $0,
coordinateAccuracy: nil,
name: nil)
}, options: .route(routeOptions),
credentials: Directions.shared.credentials)
// For demonstration purposes, simulate locations if the Simulate Navigation option is on.
let indexedRouteResponse = IndexedRouteResponse(routeResponse: routeResponse, routeIndex: 0)
let navigationService = MapboxNavigationService(indexedRouteResponse: indexedRouteResponse,
customRoutingProvider: NavigationSettings.shared.directions,
credentials: NavigationSettings.shared.directions.credentials,
simulating: simulationIsEnabled ? .always : .onPoorGPS)
let navigationOptions = NavigationOptions(navigationService: navigationService)
let navigationViewController = NavigationViewController(for: indexedRouteResponse,
navigationOptions: navigationOptions)
navigationViewController.modalPresentationStyle = .fullScreen
self.present(navigationViewController, animated: true, completion: nil)
}
 
// MARK: - Utility methods
 
private func createRouteStep(maneuverLocation: CLLocationCoordinate2D,
maneuverType: ManeuverType,
instructions: String,
distance: CLLocationDistance,
expectedTravelTime: TimeInterval,
instructionsSpokenAlongStep: [SpokenInstruction]? = nil,
instructionsDisplayedAlongStep: [VisualInstructionBanner]? = nil) -> RouteStep {
 
let routeStep = RouteStep(transportType: .automobile,
maneuverLocation: maneuverLocation,
maneuverType: maneuverType,
maneuverDirection: .straightAhead,
instructions: instructions,
initialHeading: 0.0,
finalHeading: 0.0,
drivingSide: .right,
exitCodes: [],
exitNames: [],
phoneticExitNames: [],
distance: distance,
expectedTravelTime: expectedTravelTime,
names: [],
phoneticNames: [],
codes: [],
destinationCodes: [],
destinations: [],
intersections: [],
speedLimitSignStandard: .mutcd,
speedLimitUnit: .milesPerHour,
instructionsSpokenAlongStep: instructionsSpokenAlongStep,
instructionsDisplayedAlongStep: instructionsDisplayedAlongStep)
 
return routeStep
}
 
private func createVisualInstructionBanner(text: String, distanceAlongStep: CLLocationDistance) -> VisualInstructionBanner {
 
let component = VisualInstruction.Component.text(text: .init(text: text,
abbreviation: nil,
abbreviationPriority: nil))
 
let visualInstruction = VisualInstruction(text: text,
maneuverType: .arrive,
maneuverDirection: .straightAhead,
components: [component])
 
let visualInstructionBanner = VisualInstructionBanner(distanceAlongStep: distanceAlongStep,
primary: visualInstruction,
secondary: nil,
tertiary: nil,
quaternary: nil,
drivingSide: .right)
 
return visualInstructionBanner
}
}