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  "identifier" : "/documentation/AppKit/NSDrawerDelegate/drawerShouldOpen(_:)",
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  "title" : "drawerShouldOpen(_:)"
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# drawerShouldOpen(_:)

Asks the delegate if the specified drawer should open.

```
optional func drawerShouldOpen(_ sender: NSDrawer) -> Bool
```

## Parameters

`sender`

The drawer requesting permission to open.

## Return Value

<doc://com.apple.documentation/documentation/Swift/true> if the drawer should open; <doc://com.apple.documentation/documentation/Swift/false> to prevent the drawer from opening.

## Discussion

This method is invoked on user-initiated attempts to open a drawer by dragging it or when the [`NSDrawerDelegate`](/documentation/AppKit/NSDrawerDelegate) method is called.

## See Also

  [Drawer Programming Topics](https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/Drawers/Drawers.html#//apple_ref/doc/uid/10000001i)


---

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