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.

1override func viewDidLoad() {
2    super.viewDidLoad()
3    // Do any additional setup after loading the view.
4
5    // Assumes `unsubscribeToken` is declared as an instance variable in your view
6    unsubscribeToken = Amplify.Hub.listen(to: .auth) { payload in
7        switch payload.eventName {
8        case HubPayload.EventName.Auth.signedIn:
9            print("User signed in")
10            // Update UI
11
12        case HubPayload.EventName.Auth.sessionExpired:
13            print("Session expired")
14            // Re-authenticate the user
15
16        case HubPayload.EventName.Auth.signedOut:
17            print("User signed out")
18            // Update UI
19
20        case HubPayload.EventName.Auth.userDeleted:
21            print("User deleted")
22            // Update UI
23
24        default:
25            break
26        }
27    }
28}

1override func viewDidLoad() {
2    super.viewDidLoad()
3    // Do any additional setup after loading the view.
4
5    // Assumes `sink` is declared as an instance variable in your view controller
6    sink = Amplify.Hub
7        .publisher(for: .auth)
8        .sink { payload in
9            switch payload.eventName {
10            case HubPayload.EventName.Auth.signedIn:
11                print("User signed in")
12                // Update UI
13
14            case HubPayload.EventName.Auth.sessionExpired:
15                print("Session expired")
16                // Re-authenticate the user
17
18            case HubPayload.EventName.Auth.signedOut:
19                print("User signed out")
20                // Update UI
21
22            case HubPayload.EventName.Auth.userDeleted:
23                print("User deleted")
24                // Update UI
25
26            default:
27                break
28            }
29        }
30}

Use existing Amazon Cognito resources

Use AWS SDK