Listen to auth events

AWS Cognito Auth Plugin sends important events through Amplify Hub.

Amplify iOS v1 is now in Maintenance Mode until May 31st, 2024. This means that we will continue to include updates to ensure compatibility with backend services and security. No new features will be introduced in v1.

Please use the latest version (v2) of Amplify Library for Swift to get started.

If you are currently using v1, follow these instructions to upgrade to v2.

Amplify libraries should be used for all new cloud connected applications. If you are currently using the AWS Mobile SDK for iOS, you can access the documentation here.

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.
    // Assumes `unsubscribeToken` is declared as an instance variable in your view
    unsubscribeToken = Amplify.Hub.listen(to: .auth) { payload in
        switch payload.eventName {
        case HubPayload.EventName.Auth.signedIn:
            print("User signed in")
            // Update UI
        case HubPayload.EventName.Auth.sessionExpired:
            print("Session expired")
            // Re-authenticate the user
        case HubPayload.EventName.Auth.signedOut:
            print("User signed out")
            // Update UI
        case HubPayload.EventName.Auth.userDeleted:
            print("User deleted")
            // Update UI
        default:
            break

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.
    // Assumes `sink` is declared as an instance variable in your view controller
    sink = Amplify.Hub
        .publisher(for: .auth)
        .sink { payload in
            switch payload.eventName {
            case HubPayload.EventName.Auth.signedIn:
                print("User signed in")
                // Update UI
            case HubPayload.EventName.Auth.sessionExpired:
                print("Session expired")
                // Re-authenticate the user
            case HubPayload.EventName.Auth.signedOut:
                print("User signed out")
                // Update UI
            case HubPayload.EventName.Auth.userDeleted:
                print("User deleted")
                // Update UI
            default:
                break