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# setDestination(_:allowOverwrite:)

Sets the destination path of the downloaded file.

```
func setDestination(_ path: String, allowOverwrite: Bool)
```

## Parameters

`path`

The path for the downloaded file.

`allowOverwrite`

<doc://com.apple.documentation/documentation/Swift/true> if an existing file at `path` can be replaced, <doc://com.apple.documentation/documentation/Swift/false> otherwise.

## Discussion

If `allowOverwrite` is <doc://com.apple.documentation/documentation/Swift/false> and a file already exists at `path`, a unique filename will be created for the downloaded file by appending a number to the filename. The delegate can implement the [`download(_:didCreateDestination:)`](/documentation/Foundation/NSURLDownloadDelegate/download(_:didCreateDestination:)) delegate method to determine the filename used when the file is written to disk.

### Special Considerations

An `NSURLDownload` instance ignores multiple calls to this method.

## See Also

[`-  download:decideDestinationWithSuggestedFilename:`](/documentation/Foundation/NSURLDownloadDelegate/download(_:decideDestinationWithSuggestedFilename:))

The delegate receives this message when `download` has determined a suggested filename for the downloaded file.

[`-  download:didCreateDestination:`](/documentation/Foundation/NSURLDownloadDelegate/download(_:didCreateDestination:))

Sent when the destination file is created.


---

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