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Route deserialization app

A newer version of the Navigation SDK is available

This page uses v1.4.2 of the Mapbox Navigation SDK. A newer version of the SDK is available. Learn about the latest version, v2.18.0, in the Navigation SDK documentation.

import UIKit
import MapboxCoreNavigation
import MapboxNavigation
import MapboxDirections

class RouteDeserializationViewController: UIViewController {

// MARK: - UIViewController lifecycle methods

override func viewDidLoad() {

let origin = CLLocationCoordinate2DMake(37.776818, -122.399076)
let destination = CLLocationCoordinate2DMake(37.777407, -122.399814)
let routeOptions = NavigationRouteOptions(coordinates: [origin, destination])

// Load previously serialized Route object in JSON format and deserialize it.
let routeData = JSONFromFileNamed(name: "route")
let decoder = JSONDecoder()
decoder.userInfo[.options] = routeOptions
let route: Route? = try? decoder.decode(Route.self, from: routeData)

if let route = route {
let navigationService = MapboxNavigationService(route: route, routeIndex: 0, routeOptions: routeOptions, simulating: simulationIsEnabled ? .always : .onPoorGPS)
let navigationOptions = NavigationOptions(navigationService: navigationService)
let navigationViewController = NavigationViewController(for: route, routeIndex: 0, routeOptions: routeOptions, navigationOptions: navigationOptions)
navigationViewController.modalPresentationStyle = .fullScreen
self.present(navigationViewController, animated: true, completion: nil)
} else {
print("Unable to deserialize Route.")

// MARK: - Utility methods

private func JSONFromFileNamed(name: String) -> Data {

guard let path = Bundle.main.path(forResource: name, ofType: "json") else {
preconditionFailure("File \(name) not found.")

guard let data = NSData(contentsOfFile: path) as Data? else {
preconditionFailure("No data found at \(path).")

return data