# objc_constructInstance Creates an instance of a class at the specified location. ``` extern idobjc_constructInstance(Class cls, void *bytes); ``` ## Parameters `cls` The class that you want to allocate an instance of. `bytes` The location at which to allocate an instance of the `cls` class. `bytes` must point to at least `class_getInstanceSize(cls)` bytes of well-aligned, zero-filled memory. ## Return Value An instance of the class `cls` at `bytes`, if successful; otherwise `nil` (for example, if `cls` or `bytes` are themselves `nil`). ## 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)