---
title: Predefined Callback Structures
framework: corefoundation
role: collectionGroup
role_heading: API Collection
path: corefoundation/cfdictionary-predefined-callback-structures
---

# Predefined Callback Structures

CFDictionary provides some predefined callbacks for your convenience.

## Topics

### Constants

- [kCFCopyStringDictionaryKeyCallBacks](corefoundation/kcfcopystringdictionarykeycallbacks.md)
- [kCFTypeDictionaryKeyCallBacks](corefoundation/kcftypedictionarykeycallbacks.md)
- [kCFTypeDictionaryValueCallBacks](corefoundation/kcftypedictionaryvaluecallbacks.md)