---
title: "noResponder(for:)"
framework: appkit
role: symbol
role_heading: Instance Method
path: "appkit/nsresponder/noresponder(for:)"
---

# noResponder(for:)

Handles the case where an event or action message falls off the end of the responder chain.

## Declaration

```swift
func noResponder(for eventSelector: Selector)
```

## Parameters

- `eventSelector`: A selector identifying the action or event message.

## Discussion

Discussion The default implementation beeps if eventSelector is keyDown(with:).