iOS

Integrate the Human Token Journey into your iOS app using ASWebAuthenticationSession.

Markdown

ASWebAuthenticationSession launches the Human Token Journey in a system-managed browser. When the journey finishes, the session returns to your app via the registered URL scheme.

Prerequisites

• iOS 13 or later
• Xcode 14+
• AuthenticationServices framework (built-in)
• A unique URL scheme for your app (e.g. myapp)

Step 1: Define your URL scheme

Choose a unique scheme (e.g. myapp). This is used as the callbackUri when creating the process:

callbackUri: myapp://callback

Step 2: Create the presentation context provider

import AuthenticationServices
import UIKit

class UnicoAuthenticationController: NSObject, ASWebAuthenticationPresentationContextProviding {
    func presentationAnchor(for session: ASWebAuthenticationSession) -> ASPresentationAnchor {
        guard let windowScene = UIApplication.shared.connectedScenes.first as? UIWindowScene,
              let window = windowScene.windows.first else {
            return ASPresentationAnchor()
        }
        return window
    }
}

Step 3: Create the session manager

import AuthenticationServices

class AuthenticationSessionManager {
    static let shared = AuthenticationSessionManager()
    private var session: ASWebAuthenticationSession?
    private let contextProvider = UnicoAuthenticationController()

    func start(url: URL, completion: @escaping (String?) -> Void) {
        let newSession = ASWebAuthenticationSession(
            url: url,
            callbackURLScheme: "myapp"
        ) { callbackURL, error in
            self.session = nil
            if let callbackURL = callbackURL {
                let components = URLComponents(url: callbackURL, resolvingAgainstBaseURL: false)
                let processId = components?.queryItems?.first(where: { $0.name == "id" })?.value
                completion(processId)
            } else {
                completion(nil)
            }
        }
        newSession.presentationContextProvider = contextProvider
        newSession.prefersEphemeralWebBrowserSession = true
        newSession.start()
        session = newSession
    }
}

Step 4: Launch the journey

guard let url = URL(string: processLink) else { return }

AuthenticationSessionManager.shared.start(url: url) { processId in
    if let processId = processId {
        // Journey completed — send processId to your backend via Get Process
    } else {
        // User canceled the session
    }
}

info

The callbackURLScheme parameter takes only the scheme name (myapp), without ://.

File summary

File	Purpose
UnicoAuthenticationController.swift	Presentation context provider
Session manager (your view or service)	ASWebAuthenticationSession lifecycle