---
title: "keyDown(with:)"
framework: appkit
role: symbol
role_heading: Instance Method
path: "appkit/nsresponder/keydown(with:)"
---

# keyDown(with:)

Informs the receiver that the user has pressed a key.

## Declaration

```swift
func keyDown(with event: NSEvent)
```

## Parameters

- `event`: An object encapsulating information about the key-down event.

## Discussion

Discussion The receiver can interpret event itself, or pass it to the system input manager using interpretKeyEvents(_:). The default implementation simply passes this message to the next responder.

## See Also

### Responding to Key Events

- [keyUp(with:)](appkit/nsresponder/keyup(with:).md)
- [interpretKeyEvents(_:)](appkit/nsresponder/interpretkeyevents(_:).md)
- [performKeyEquivalent(with:)](appkit/nsresponder/performkeyequivalent(with:).md)
- [flushBufferedKeyEvents()](appkit/nsresponder/flushbufferedkeyevents().md)