# property_copyAttributeValue(_:_:) Returns the value of a property attribute given the attribute name. ``` func property_copyAttributeValue(_ property: objc_property_t, _ attributeName: UnsafePointer) -> UnsafeMutablePointer? ``` ## Parameters `property` The property whose value you are interested in. `attributeName` A C string representing the name of the attribute. ## Return Value The value string of the `attributeName` attribute, if one exists in `property`; otherwise, `nil`. You must free the returned value string with `free()`. ## 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)