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# currentDocument

The document object associated with the main window.

```
var currentDocument: NSDocument? { get }
```

## Discussion

The value of this property is `nil` if it is called when the app is not active. This can occur during processing of a drag-and-drop operation, for example, in an implementation of `readSelectionFromPasteboard:`. In such a case, send the following message instead from an `NSView` subclass associated with the document:

```objc
[[[self window] windowController] document];
```

## See Also

[`-  documentForFileName:`](/documentation/AppKit/NSDocumentController/documentForFileName:)

Returns the document object for the file in which the document data is stored.


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