# class_copyIvarList(_:_:) Describes the instance variables declared by a class. ``` func class_copyIvarList(_ cls: AnyClass?, _ outCount: UnsafeMutablePointer?) -> UnsafeMutablePointer? ``` ## Parameters `cls` The class to inspect. `outCount` On return, contains the length of the returned array. If `outCount` is `NULL`, the length is not returned. ## Return Value An array of pointers of type Ivar describing the instance variables declared by the class. Any instance variables declared by superclasses are not included. The array contains `*outCount` pointers followed by a `NULL` terminator. You must free the array with `free()`. If the class declares no instance variables, or `cls` is `Nil` , `NULL` is returned and `*outCount` is `0` . ## 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)