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Showing content from https://developers.arcgis.com/swift/route-and-directions/tutorials/find-a-route-and-directions/ below:

Find a route and directions | ArcGIS Maps SDK for Swift

Learn how to find a route and directions with the route service.

Overview of how to find a route and directions

Routing is the process of finding the path from an origin to a destination in a street network. You can use the Routing service to find routes, get driving directions, calculate drive times, and solve complicated, multiple vehicle routing problems. To create a route, you typically define a set of stops (origin and one or more destinations) and use the service to find a route with directions. You can also use a number of additional parameters such as barriers and mode of travel to refine the results.

In this tutorial, you define an origin and destination by clicking on the map. These values are used to get a route and directions from the route service. The directions are also displayed on the map.

Mapping and location services guide

For more background information about the topics in this tutorial, visit Routing and directions. To learn more about the service, visit Routing services.

Prerequisites

Before starting this tutorial:

You need an ArcGIS Location Platform or ArcGIS Online account.
Your system meets the system requirements.

Set up authentication

To access the secure ArcGIS location services used in this tutorial, you must implement API key authentication or user authentication using an ArcGIS Location Platform or an ArcGIS Online account.

You can implement API key authentication or user authentication in this tutorial. Compare the differences below:

API key authentication

Users are not required to sign in.
Requires creating an API key credential with the correct privileges.
API keys are long-lived access tokens.
Service usage is billed to the API key owner/developer.
Simplest authentication method to implement.
Recommended approach for new ArcGIS developers.

Learn more in API key authentication.

User authentication

Users are required to sign in with an ArcGIS account.
User accounts must have privilege to access the ArcGIS services used in application.
Requires creating OAuth credentials.
Application uses a redirect URL and client ID.
Service usage is billed to the organization of the user signed into the application.

Learn more in User authentication.

Security and authentication guide

To learn more about the different types of authentication, visit Types of authentication.

Create a new API key access token with privileges to access the secure resources used in this tutorial.

Complete the Create an API key tutorial and create an API key with the following privilege(s):
- Privileges
  - Location services > Basemaps
  - Location services > Routing
Copy and paste the API key access token into a safe location. It will be used in a later step.

Create new OAuth credentials to access the secure resources used in this tutorial.

Complete the Create OAuth credentials for user authentication tutorial to obtain a Client ID and Redirect URL.

A Client ID uniquely identifies your app on the authenticating server. If the server cannot find an app with the provided Client ID, it will not proceed with authentication.

The Redirect URL (also referred to as a callback url) is used to identify a response from the authenticating server when the system returns control back to your app after an OAuth login. Since it does not necessarily represent a valid endpoint that a user could navigate to, the redirect URL can use a custom scheme, such as my-app://auth. It is important to make sure the redirect URL used in your app's code matches a redirect URL configured on the authenticating server.
Copy and paste the Client ID and Redirect URL into a safe location. They will be used in a later step.

All users that access this application need account privileges to access the ArcGIS Basemap Styles service and the ArcGIS Routing service.

Develop or Download

You have two options for completing this tutorial:

Option 1: Develop the code

To start the tutorial, complete the Display a map tutorial. This creates a map to display the Santa Monica Mountains in California using the topographic basemap from the ArcGIS Basemap Styles service.

Continue with the following instructions to find a route and directions with the ArcGIS Routing service. First, you need to set the develop credentials in your app so that your app users can access the ArcGIS Routing service.

Set developer credentials

If you implemented API key authentication in the Display a map tutorial, the API key access token will only have the Basemaps privilege. The Find a route and directions tutorial requires the Routing privilege to find a route using the RouteTask. To create an API Key access token that has the Basemaps and Routing privileges, see the Set up authentication step and then follow the instructions below.

Pass your API Key access token to the ArcGISEnvironment.

In the Project Navigator, click MainApp.swift.

Set the ArcGISEnvironment.apiKey property with your API key access token.

MainApp.swift

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        ArcGISEnvironment.apiKey = APIKey("<#YOUR-ACCESS-TOKEN#>")

Best Practice: The access token is stored directly in the code as a convenience for this tutorial. Do not store credentials directly in source code in a production environment.

Use the Authenticator toolkit component to manage your OAuth credentials and pass it to the ArcGISEnvironment.

In the Project Navigator, click MainApp.swift.

Set your PortalURL, clientID and redirectURL values.

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        authenticator = Authenticator(oAuthUserConfigurations: [
            OAuthUserConfiguration(

                portalURL: URL(string: "<#YOUR-PORTAL-URL#>")!,
                clientID: ""<#YOUR-CLIENT-ID#>"",
                redirectURL: URL(string: "<#YOUR-REDIRECT-URL#>")!

            )
        ])
        ArcGISEnvironment.authenticationManager.handleChallenges(using: authenticator)

Best Practice: The OAuth credentials are stored directly in the code as a convenience for this tutorial. Do not store credentials directly in source code in a production environment.

Update the map

A navigation basemap layer is typically used in routing applications. Update the basemap to use the .arcGISNavigation basemap style, and change the position of the map to center on Los Angeles.

Update the Basemap style property from .arcGISTopographic to .arcGISNavigation and update the latitude and longitude coordinates to center on Los Angeles.

ContentView.swift

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struct ContentView: View {

    @State var map = {

        let map = Map(basemapStyle: .arcGISNavigation)
        map.initialViewpoint = Viewpoint(latitude: 34.05293, longitude: -118.24368, scale: 2e5)

        return map
    }()

Create a private class named Model of type ObservableObject and add a @StateObject variable of the Model to the ContentView. See the programming patterns page for more information on how to manage states.

ContentView.swift

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import SwiftUI

import ArcGIS

class Model: ObservableObject {

}

struct ContentView: View {

    @StateObject private var model = Model()

    @State var map = {

        let map = Map(basemapStyle: .arcGISNavigation)
        map.initialViewpoint = Viewpoint(latitude: 34.05293, longitude: -118.24368, scale: 2e5)

        return map
    }()

}

Add graphics to the map view

A graphics overlay is a container for graphics. Graphics are added as a visual means to display the search result on the map.

In the Model class, create a GraphicsOverlay named graphicsOverlay. In the ContentView, add the graphics overlay to the map view.

A graphics overlay is a container for graphics. It is used with a map view to display graphics on a map. You can add more than one graphics overlay to a map view. Graphics overlays are displayed on top of all the other layers.

ContentView.swift

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import SwiftUI

import ArcGIS

class Model: ObservableObject {

    let graphicsOverlay = GraphicsOverlay()

}

struct ContentView: View {

    @StateObject private var model = Model()

    @State var map = {

        let map = Map(basemapStyle: .arcGISNavigation)
        map.initialViewpoint = Viewpoint(latitude: 34.05293, longitude: -118.24368, scale: 2e5)

        return map
    }()

    var body: some View {

        MapView(map: map, graphicsOverlays: [model.graphicsOverlay])

    }

}

Create a private Graphic property named startGraphic to the Model. Symbolize the graphic with a white circle and black outline. This graphic will be used to display the route's start location.

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class Model: ObservableObject {

    let graphicsOverlay = GraphicsOverlay()

    let startGraphic: Graphic = {
        let symbol = SimpleMarkerSymbol(style: .circle, color: .white, size: 8)
        symbol.outline = SimpleLineSymbol(style: .solid, color: .black, width: 1)
        let graphic = Graphic(symbol: symbol)
        return graphic
    }()

}

Create a private Graphic property named endGraphic. Symbolize the graphic with a black circle. This graphic will be used to display the route's end location.

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class Model: ObservableObject {

    let graphicsOverlay = GraphicsOverlay()

    let startGraphic: Graphic = {
        let symbol = SimpleMarkerSymbol(style: .circle, color: .white, size: 8)
        symbol.outline = SimpleLineSymbol(style: .solid, color: .black, width: 1)
        let graphic = Graphic(symbol: symbol)
        return graphic
    }()

    let endGraphic: Graphic = {
        let symbol = SimpleMarkerSymbol(style: .circle, color: .black, size: 9)
        let graphic = Graphic(symbol: symbol)
        return graphic
    }()

}

Create a private Graphic property named routeGraphic. Symbolize the graphic with a blue line. This graphic will be used to display the route line.

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    let endGraphic: Graphic = {
        let symbol = SimpleMarkerSymbol(style: .circle, color: .black, size: 9)
        let graphic = Graphic(symbol: symbol)
        return graphic
    }()

    let routeGraphic: Graphic = {
        let symbol = SimpleLineSymbol(style: .solid, color: .blue, width: 3)
        let graphic = Graphic(symbol: symbol)
        return graphic
    }()

Create an init() method in the Model that adds startGraphic, endGraphic, and routeGraphic to the graphics overlay. This method will be called when Model is initialized.

Because startGraphic, endGraphic, and routeGraphic haven't yet specified a Geometry, they will not be visible.

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    let routeGraphic: Graphic = {
        let symbol = SimpleLineSymbol(style: .solid, color: .blue, width: 3)
        let graphic = Graphic(symbol: symbol)
        return graphic
    }()

    init() {
        graphicsOverlay.addGraphics([routeGraphic, startGraphic, endGraphic])
    }

Create a route task and route parameters

A task makes a request to a service and returns the results. Use the RouteTask class to access a routing service.

A routing service with global coverage is part of ArcGIS location services. You can also publish custom routing services using ArcGIS Enterprise.

Continuing in the Model, create a private RouteTask property named routeTask with the routing service.

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    init() {
        graphicsOverlay.addGraphics([routeGraphic, startGraphic, endGraphic])
    }

    private let routeTask = RouteTask(
        url: URL(string: "https://route-api.arcgis.com/arcgis/rest/services/World/Route/NAServer/Route_World")!
    )

Create a variable named directions defined as an array of DirectionManeuver objects. This will contain the step by step directions from the start to the end point.

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    private let routeTask = RouteTask(
        url: URL(string: "https://route-api.arcgis.com/arcgis/rest/services/World/Route/NAServer/Route_World")!
    )

    var directions: [DirectionManeuver] = []

Define a private, asynchronous function named solveRoute(start:end:) that takes a start and end Point. This method will be called when both the start and end points have been placed on the map.

ContentView.swift

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    private let routeTask = RouteTask(
        url: URL(string: "https://route-api.arcgis.com/arcgis/rest/services/World/Route/NAServer/Route_World")!
    )

    var directions: [DirectionManeuver] = []

    func solveRoute(from start: Point, to end: Point) async throws {

    }

Create default RouteParameters from the routeTask named routeParameters. Configure the parameters by setting two stops (the start and end points) and specify that directions are returned.

ContentView.swift

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    func solveRoute(from start: Point, to end: Point) async throws {

        let routeParameters = try await routeTask.makeDefaultParameters()
        routeParameters.returnsDirections = true
        routeParameters.setStops([Stop(point: start), Stop(point: end)])

    }

Call the solveRoute(using:) function on the routeTask and pass in the routeParameters. To display the solved route, get the first route from the RouteResult and assign its geometry to routeGraphic. To display the directions, assign the directionManeuvers value from the first route to the directions variable.

ContentView.swift

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    func solveRoute(from start: Point, to end: Point) async throws {

        let routeParameters = try await routeTask.makeDefaultParameters()
        routeParameters.returnsDirections = true
        routeParameters.setStops([Stop(point: start), Stop(point: end)])

        let routeResult = try await routeTask.solveRoute(using: routeParameters)
        if let firstRoute = routeResult.routes.first {
            routeGraphic.geometry = firstRoute.geometry
            directions = firstRoute.directionManeuvers
        }

    }

Handle map view touch events

The app will use locations derived from a user tapping the map view to generate the stops on a route. Configure the view to handle touch events from the map view. The locations derived from a user tapping the map view will be used to generate routes in a later step.

In the ContentView struct, create two @State private variables of type Point named startPoint and endPoint. These will contain the start and end locations of the route.

ContentView.swift

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struct ContentView: View {

    @StateObject private var model = Model()

    @State private var startPoint: Point?
    @State private var endPoint: Point?

    @State var map = {

        let map = Map(basemapStyle: .arcGISNavigation)
        map.initialViewpoint = Viewpoint(latitude: 34.05293, longitude: -118.24368, scale: 2e5)

        return map
    }()

    var body: some View {

        MapView(map: map, graphicsOverlays: [model.graphicsOverlay])

    }

}

Add the onSingleTapGesture method to the map view. If it is the user's first tap, set the startPoint to the current mapPoint. Otherwise, set the endPoint to the current mapPoint. Assign the geometries for startGraphic and endGraphic accordingly.

ContentView.swift

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    var body: some View {

        MapView(map: map, graphicsOverlays: [model.graphicsOverlay])

            .onSingleTapGesture { _, mapPoint in
                if startPoint == nil {
                    startPoint = mapPoint
                    model.startGraphic.geometry = startPoint
                } else {
                    endPoint = mapPoint
                    model.endGraphic.geometry = endPoint
                }
            }

    }

Add a .task modifier to the map view with endPoint as an identifier. This task is called if the value of endPoint changes. Ensure that the start and end points are not nil and pass them into the model's solveRoute(start:end:) method. This attempts to solve the route using the start and end points.

ContentView.swift

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    var body: some View {

        MapView(map: map, graphicsOverlays: [model.graphicsOverlay])

            .onSingleTapGesture { _, mapPoint in
                if startPoint == nil {
                    startPoint = mapPoint
                    model.startGraphic.geometry = startPoint
                } else {
                    endPoint = mapPoint
                    model.endGraphic.geometry = endPoint
                }
            }

            .task(id: endPoint) {
                guard let startPoint = startPoint, let endPoint = endPoint else { return }
                do {
                    try await model.solveRoute(from: startPoint, to: endPoint)
                } catch {
                    print(error)
                }
            }

    }

Add a UI to display driving directions

To display the turn-by-turn directions from the route, some UI element is required.

In the ContentView struct, add a Bool variable named isShowingDirections to indicate if the directions are shown or not. Set its initial value to false.

ContentView.swift

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struct ContentView: View {

    @StateObject private var model = Model()

    @State private var isShowingDirections = false

    @State private var startPoint: Point?
    @State private var endPoint: Point?

    @State var map = {

        let map = Map(basemapStyle: .arcGISNavigation)
        map.initialViewpoint = Viewpoint(latitude: 34.05293, longitude: -118.24368, scale: 2e5)

        return map
    }()

Add a .toolbar and ToolbarItemGroup to the bottom of the map view.

ContentView.swift

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    var body: some View {

        MapView(map: map, graphicsOverlays: [model.graphicsOverlay])

            .onSingleTapGesture { _, mapPoint in
                if startPoint == nil {
                    startPoint = mapPoint
                    model.startGraphic.geometry = startPoint
                } else {
                    endPoint = mapPoint
                    model.endGraphic.geometry = endPoint
                }
            }

            .task(id: endPoint) {
                guard let startPoint = startPoint, let endPoint = endPoint else { return }
                do {
                    try await model.solveRoute(from: startPoint, to: endPoint)
                } catch {
                    print(error)
                }
            }

            .toolbar {
                ToolbarItemGroup(placement: .bottomBar) {

                }
            }

    }

Add a Button, labeled "Show directions", to the toolbar. This button indicates that the user wants to show the directions so toggle the isShowingDirections value to true.

ContentView.swift

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            .toolbar {
                ToolbarItemGroup(placement: .bottomBar) {

                    Button("Show directions") {
                        isShowingDirections = true
                    }

                }
            }

Add a .popover with a NavigationView to the toolbar. Set the popover's isPresented parameter to isShowingDirections. The popover will display according to the isShowingDirections value. Customize the navigation view.

ContentView.swift

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            .toolbar {
                ToolbarItemGroup(placement: .bottomBar) {

                    Button("Show directions") {
                        isShowingDirections = true
                    }

                    .popover(isPresented: $isShowingDirections) {
                        NavigationView {

                        }
                        .navigationViewStyle(.stack)
                        .frame(idealWidth: 320, idealHeight: 428)
                    }

                }
            }

Within the NavigationView content, create a List with directions which contains an array of DirectionManeuver objects. Configure the navigation view with a title, display mode, and "Done" button. When the button is tapped, isShowingDirections is set to false which closes the popover.

ContentView.swift

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                    .popover(isPresented: $isShowingDirections) {
                        NavigationView {

                            List(model.directions, id: \.text) { directionManeuver in
                                Text(directionManeuver.text)
                            }
                            .navigationTitle("Directions")
                            .navigationBarTitleDisplayMode(.inline)
                            .toolbar {
                                ToolbarItem(placement: .confirmationAction) {
                                    Button("Done") {
                                        isShowingDirections = false
                                    }
                                }
                            }

                        }
                        .navigationViewStyle(.stack)
                        .frame(idealWidth: 320, idealHeight: 428)
                    }

Run the solution

Press Command + R to run the app.

If you are using the Xcode simulator your system must meet these minimum requirements: macOS 14 (Sonoma), Xcode 16, iOS 18. If you are using a physical device, then refer to the system requirements.

The map should support two taps to create an origin and destination point and then use the ArcGIS Routing service to display the resulting route.

Alternatively, you can download the tutorial solution, as follows.

Option 2: Download the solution

Click the Download solution link under Solution and unzip the file to a location on your machine.
Open the .xcodeproj file in Xcode.

Since the downloaded solution does not contain authentication credentials, you must add the developer credentials that you created in the Set up authentication section.

Set developer credentials in the solution

To allow your app users to access ArcGIS location services, use the developer credentials that you created in the Set up authentication step to authenticate requests for resources.

Pass your API Key access token to the ArcGISEnvironment.

In the Project Navigator, click MainApp.swift.

Set the AuthenticationMode to .apiKey.

MainApp.swift

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    // Change the `AuthenticationMode` to `.apiKey` if your application uses API key authentication.

    private var authenticationMode: AuthenticationMode { .apiKey }

Set the apiKey property with your API key access token.

MainApp.swift

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    // Please enter an API key access token if your application uses API key authentication.

    private let apiKey = APIKey("<#YOUR-ACCESS-TOKEN#>")

Best Practice: The access token is stored directly in the code as a convenience for this tutorial. Do not store credentials directly in source code in a production environment.

Use the Authenticator toolkit component to manage your OAuth credentials and pass it to the ArcGISEnvironment.

In the Project Navigator, click MainApp.swift.

Set the AuthenticationMode to .user.

MainApp.swift

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// Change the `AuthenticationMode` to `.user` if your application uses OAuth credentials.

private var authenticationMode: AuthenticationMode { .user }

Set your portalURL, clientID and redirectURL values.

MainApp.swift

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    // Setup an `Authenticator` with OAuth configuration if your application uses OAuth credentials.
    @ObservedObject var authenticator = Authenticator(
        oAuthUserConfigurations: [
            OAuthUserConfiguration(

                // Please enter OAuth credentials for user authentication.

                portalURL: URL(string: "<#YOUR-PORTAL-URL#>")!,
                clientID: "<#YOUR-CLIENT-ID#>",
                redirectURL: URL(string: "<#YOUR-REDIRECT-URL#>")!

            )
        ]
    )

Best Practice: The OAuth credentials are stored directly in the code as a convenience for this tutorial. Do not store credentials directly in source code in a production environment.

Run the solution

Press Command + R to run the app.

The map should support two taps to create an origin and destination point and then use the ArcGIS Routing service to display the resulting route.

What's next?

Learn how to use additional API features, ArcGIS location services, and ArcGIS tools in these tutorials:

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