# willPresentError(_:) Indicates an error condition and provides the opportunity to return the same or a different error. ``` func willPresentError(_ error: any Error) -> any Error ``` ## Parameters `error` The error to present. ## Discussion The default implementation of this method merely returns the passed-in error. The returned error may simply be forwarded to the application object. You can override this method to customize the presentation of errors by examining the passed-in error and, for example, returning more specific information. When you override this method always check the `NSError` object’s domain and code to discriminate between errors whose presentation you want to customize and those you don’t. For errors you don’t want to customize, call the superclass implementation, passing the original error. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)