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# CVBufferHasAttachment(_:_:)

Returns a Boolean value that indicates whether a Core Video buffer contains a specified attachment.

```
func CVBufferHasAttachment(_ buffer: CVBuffer, _ key: CFString) -> Bool
```

## Parameters

`buffer`

A Core Video buffer to query.

`key`

A string that identifies the attachment, which can be of any <doc://com.apple.documentation/documentation/CoreFoundation/CFTypeRef>.

## Return Value

<doc://com.apple.documentation/documentation/Swift/true> if the buffer contains the attachment; otherwise, <doc://com.apple.documentation/documentation/Swift/false>.

## Discussion

---

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