# class_replaceProperty(_:_:_:_:) Replace a property of a class. ``` func class_replaceProperty(_ cls: AnyClass?, _ name: UnsafePointer, _ attributes: UnsafePointer?, _ attributeCount: UInt32) ``` ## Parameters `cls` The class to modify. `name` The name of the property. `attributes` An array of property attributes. `attributeCount` The number of attributes in `attributes`. ## Discussion --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)