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# resignKey()

Resigns the window’s key window status.

```
func resignKey()
```

## Discussion

This method sends [`resignKey()`](/documentation/AppKit/NSWindow/resignKey()) to the window’s first responder, sends [`windowDidResignKey(_:)`](/documentation/AppKit/NSWindowDelegate/windowDidResignKey(_:)) to the window’s delegate, and posts [`didResignKeyNotification`](/documentation/AppKit/NSWindow/didResignKeyNotification) to the default notification center.

Never invoke this method directly.

## See Also

[`-  resignMainWindow`](/documentation/AppKit/NSWindow/resignMain())

Resigns the window’s main window status.


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