Learn how to create and display a map from a web map stored in ArcGIS.
A web map contains the definition of a map, including properties such as the basemap, initial extent, layers, styles, pop-ups, and labels. You can author and save web maps using the Map Viewer or ArcGIS Pro and share them in ArcGIS. Each web map is stored as an item in ArcGIS Online or ArcGIS Enterprise, allowing you to access a web map from a portal using its item ID and display it in your app.
In this tutorial, you use a web map's item ID to display a map of
trails, trailheads and parks in the Santa Monica Mountains
. The web map is hosted in
ArcGIS Online.
NoteFor more background information about the topics in this tutorial, visit Maps (2D) and in the Mapping and location services guide.
PrerequisitesBefore starting this tutorial:
You need an ArcGIS Location Platform or ArcGIS Online account.
Your system meets the system requirements.
To start the tutorial, complete the Display a map tutorial or download and unzip the solution.
Open the .xcodeproj file in Xcode.
If you downloaded the solution, get an access token and set the API key.
An API Key gives your app access to secure resources used in this tutorial.
Go to the Create an API key tutorial to obtain a new API key access token using your ArcGIS Location Platform or ArcGIS Online account. Ensure that the following privilege is enabled: Location services > Basemaps > Basemap styles service. Copy the access token as it will be used in the next step.
In Xcode, in the Project Navigator, click AppDelegate.swift.
In the editor, set the APIKey property on the AGSArcGISRuntimeEnvironment with your access token.
AppDelegate.swift
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func application(_ application: UIApplication,
didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
AGSArcGISRuntimeEnvironment.apiKey = "YOUR_ACCESS_TOKEN"
return true
}
The access token is stored directly in the code as a convenience for this tutorial. Storing access tokens in the source code is not best practice.
You can use ArcGIS tools to create and view web maps. Use the Map Viewer to identify the web map item ID. This item ID will be used later in the tutorial.
trails, trailheads and parks in the Santa Monica Mountains
.41281c51f9de45edaf1c8ed44bb10e30
.You can create a map from a web map using the web map's item ID. Use the AGSPortalItem class to access the web map, and the AGSMap class to create and display a map from it.
In Xcode, in the Project Navigator, click ViewController.swift.
In the editor, modify the setupMap() function to create an AGSPortalItem for the web map. To do this, provide the web map's item ID and an AGSPortal referencing ArcGIS Online.
ViewController.swift
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private func setupMap() {
let portal = AGSPortal.arcGISOnline(withLoginRequired: false)
let itemID = "41281c51f9de45edaf1c8ed44bb10e30"
let portalItem = AGSPortalItem(portal: portal, itemID: itemID)
}
The AGSPortal object is created using a convenience function that points to ArcGIS Online. This is the equivalent of:
Use dark colors for code blocks Copy
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AGSPortal(url: URL(string: "https://www.arcgis.com")!, loginRequired: false)Create an AGSMap using the AGSPortalItem. To display the map, set the mapView's map property to this new AGSMap.
ViewController.swift
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private func setupMap() {
let portal = AGSPortal.arcGISOnline(withLoginRequired: false)
let itemID = "41281c51f9de45edaf1c8ed44bb10e30"
let portalItem = AGSPortalItem(portal: portal, itemID: itemID)
let map = AGSMap(item: portalItem)
mapView.map = map
}
Press Command + R to run the app.
If you are using the Xcode simulator your system must meet these minimum requirements: macOS Big Sur 11.3, Xcode 13, iOS 13. If you are using a physical device, then refer to the system requirements.
You should see a map of
trails, trailheads and parks in the Santa Monica Mountains
. Pinch, drag, and double-tap the map view to explore the map.
What's next?Learn how to use additional API features, ArcGIS location services, and ArcGIS tools in these tutorials:
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