---
title: CFArrayCopyDescriptionCallBack
framework: corefoundation
role: symbol
role_heading: Type Alias
path: corefoundation/cfarraycopydescriptioncallback
---

# CFArrayCopyDescriptionCallBack

Prototype of a callback function used to get a description of a value in an array.

## Declaration

```swift
typealias CFArrayCopyDescriptionCallBack = (UnsafeRawPointer?) -> Unmanaged<CFString>?
```

## Parameters

- `value`: The value to be described.

## Return Value

Return Value A textual description of value. The caller is responsible for releasing this object.

## Discussion

Discussion This callback is passed to CFArrayCreate(_:_:_:_:) in a CFArrayCallBacks structure. This callback is used by the CFCopyDescription(_:) function.

## See Also

### Callbacks

- [CFArrayApplierFunction](corefoundation/cfarrayapplierfunction.md)
- [CFArrayEqualCallBack](corefoundation/cfarrayequalcallback.md)
- [CFArrayReleaseCallBack](corefoundation/cfarrayreleasecallback.md)
- [CFArrayRetainCallBack](corefoundation/cfarrayretaincallback.md)