---
title: "objc_registerClassPair(_:)"
framework: Objective-C Runtime
role: symbol
role_heading: Function
platforms: [iOS 2.0+, iPadOS 2.0+, Mac Catalyst 13.1+, macOS 10.5+, tvOS 9.0+, visionOS 1.0+, watchOS 1.0+]
path: "objectivec/objc_registerclasspair(_:)"
---

# objc_registerClassPair(_:)

Registers a class that was allocated using objc_allocateClassPair(_:_:_:).

## Declaration

```swift
func objc_registerClassPair(_ cls: AnyClass)
```

## Parameters

- `cls`: The class you want to register.

## See Also

### Adding Classes

- [objc_allocateClassPair(_:_:_:)](objectivec/objc_allocateclasspair(_:_:_:).md)
- [objc_disposeClassPair(_:)](objectivec/objc_disposeclasspair(_:).md)
- [objc_duplicateClass(_:_:_:)](objectivec/objc_duplicateclass(_:_:_:).md)