# class_setIvarLayout(_:_:) Sets the `Ivar` layout for a given class. ``` func class_setIvarLayout(_ cls: AnyClass?, _ layout: UnsafePointer?) ``` ## Parameters `cls` The class to modify. `layout` The layout of the `Ivar`s for `cls`. ## 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)