Add a feature layer from a portal item

Create a new API key access token An access token is an authorization string that provides access to secure ArcGIS content, data, and services. Its capabilities are determined by the privileges it supports. It is obtained by implementing API key authentication, User authentication, or App authentication. Learn more with privileges Privileges are a set of permissions assigned to ArcGIS accounts, developer credentials, and applications that grant access to secure resources and functionality in ArcGIS. Learn more to access the secure resources used in this tutorial.

1. Complete the Create an API key tutorial and create an API key with the following privilege(s) Privileges are a set of permissions assigned to ArcGIS accounts, developer credentials, and applications that grant access to secure resources and functionality in ArcGIS. Learn more :

   • Privileges
     • Location services > Basemaps

2. 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.

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

   More about the 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.

2. 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 Privileges are a set of permissions assigned to ArcGIS accounts, developer credentials, and applications that grant access to secure resources and functionality in ArcGIS. Learn more to access the ArcGIS Basemap Styles service The ArcGIS Basemap Styles service, also referred to as the Basemap Styles service, is a location service that provides basemap styles and data for the world. It returns styles as Mapbox styles and web maps, and data as vector tiles and/or map tiles. It supports all of the styles in the ArcGIS Basemap style and Open Basemap style family. An ArcGIS Location Platform or ArcGIS Online account is required to use the service. Learn more .

Pass your API Key access token to the ArcGISEnvironment.

1. In the Project Navigator, click MainApp.swift.

2. Set the AuthenticationMode to .apiKey.

   MainApp.swift

       // Change the `AuthenticationMode` to `.apiKey` if your application uses API key authentication.
   
       private var authenticationMode: AuthenticationMode { .apiKey }

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

   MainApp.swift

   31 collapsed lines
   // Copyright 2022 Esri
   //
   // Licensed under the Apache License, Version 2.0 (the "License");
   // you may not use this file except in compliance with the License.
   // You may obtain a copy of the License at
   //
   //   https://www.apache.org/licenses/LICENSE-2.0
   //
   // Unless required by applicable law or agreed to in writing, software
   // distributed under the License is distributed on an "AS IS" BASIS,
   // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   // See the License for the specific language governing permissions and
   // limitations under the License.
   import SwiftUI
   import ArcGIS
   import ArcGISToolkit
   @main
   
   struct MainApp: App {
   
       // The authentication mode.
       private enum AuthenticationMode {
           case apiKey
           case user
       }
   
       // Change the `AuthenticationMode` to `.apiKey` if your application uses API key authentication.
   
       private var authenticationMode: AuthenticationMode { .apiKey }
   
   
       // Please enter an API key access token if your application uses API key authentication.
   
       private let apiKey = APIKey("<#YOUR-ACCESS-TOKEN#>")
   
   43 collapsed lines
   
       // 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#>")!
   
               )
           ]
       )
   
       func setAuthentication() {
           switch authenticationMode {
           case .apiKey:
               ArcGISEnvironment.apiKey = apiKey
           case .user:
               ArcGISEnvironment.authenticationManager.arcGISAuthenticationChallengeHandler = authenticator
           }
       }
   
       init() {
           setAuthentication()
       }
   
   
       var body: some SwiftUI.Scene {
   
           WindowGroup {
               ContentView()
   
                   .authenticator(authenticator)
   
                   .ignoresSafeArea()
   
           }
       }
   
   }

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 OAuth credentials are an item that contains parameters required to implement user authentication or app authentication, including a client_id, client_secret, and redirect URIs. They are a type of developer credential. Learn more and pass it to the ArcGISEnvironment.

1. In the Project Navigator, click MainApp.swift.

2. Set the AuthenticationMode to .user.

   MainApp.swift

   // Change the `AuthenticationMode` to `.user` if your application uses OAuth credentials.
   
   private var authenticationMode: AuthenticationMode { .user }

3. Set your portalURL, clientID and redirectURL values.

   MainApp.swift

   36 collapsed lines
   // Copyright 2022 Esri
   //
   // Licensed under the Apache License, Version 2.0 (the "License");
   // you may not use this file except in compliance with the License.
   // You may obtain a copy of the License at
   //
   //   https://www.apache.org/licenses/LICENSE-2.0
   //
   // Unless required by applicable law or agreed to in writing, software
   // distributed under the License is distributed on an "AS IS" BASIS,
   // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   // See the License for the specific language governing permissions and
   // limitations under the License.
   import SwiftUI
   import ArcGIS
   import ArcGISToolkit
   @main
   
   struct MainApp: App {
   
       // The authentication mode.
       private enum AuthenticationMode {
           case apiKey
           case user
       }
   
       // Change the `AuthenticationMode` to `.user` if your application uses OAuth credentials.
   
       private var authenticationMode: AuthenticationMode { .apiKey }
   
   
       // Please enter an API key access token if your application uses API key authentication.
   
       private let apiKey = APIKey("<#YOUR-ACCESS-TOKEN#>")
   
   
       // 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#>")!
   
               )
           ]
       )
   28 collapsed lines
   
       func setAuthentication() {
           switch authenticationMode {
           case .apiKey:
               ArcGISEnvironment.apiKey = apiKey
           case .user:
               ArcGISEnvironment.authenticationManager.arcGISAuthenticationChallengeHandler = authenticator
           }
       }
   
       init() {
           setAuthentication()
       }
   
   
       var body: some SwiftUI.Scene {
   
           WindowGroup {
               ContentView()
   
                   .authenticator(authenticator)
   
                   .ignoresSafeArea()
   
           }
       }
   
   }

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.