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# ASAuthorizationControllerDelegate

An interface for providing information about the outcome of an authorization request.

```
@MainActor protocol ASAuthorizationControllerDelegate : NSObjectProtocol
```

## Topics

### Handling Successful Authorization

[`authorizationController(_:didCompleteWithCustomMethod:)`](/documentation/AuthenticationServices/ASAuthorizationControllerDelegate/authorizationController(_:didCompleteWithCustomMethod:))

Informs the delegate when authorization completes, and specifies the custom method the user selected.

[`authorizationController(controller:didCompleteWithAuthorization:)`](/documentation/AuthenticationServices/ASAuthorizationControllerDelegate/authorizationController(controller:didCompleteWithAuthorization:))

Tells the delegate when authorization completes successfully.

[`ASAuthorization`](/documentation/AuthenticationServices/ASAuthorization)

The encapsulation of a successful authorization by a controller.

### Handling Authorization Errors

[`authorizationController(controller:didCompleteWithError:)`](/documentation/AuthenticationServices/ASAuthorizationControllerDelegate/authorizationController(controller:didCompleteWithError:))

Tells the delegate when authorization fails, and provides an error explaining why.

[`ASAuthorizationErrorDomain`](/documentation/AuthenticationServices/ASAuthorizationErrorDomain)

The domain of authorization errors.

[`ASAuthorizationError`](/documentation/AuthenticationServices/ASAuthorizationError-swift.struct)

Errors that can occur during authorization.


---

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