# enumerateChildNodes(_:) Executes the specified block for each of the node’s child and descendant nodes. ``` func enumerateChildNodes(_ block: (SCNNode, UnsafeMutablePointer) -> Void) ``` ## Parameters `block` The block to apply to the node’s child and descendant nodes. - The block takes two parameters: - - term child: The child node currently being evaluated. - stop: A reference to a Boolean value. Set `*stop` to in the block to abort further processing of the child node subtree. ## Discussion SceneKit uses a recursive preorder traversal to process the child node subtree—that is, the block runs for a node before it runs for each of the node’s children, and it processes all children of a node before processing any of that node’s sibling nodes. --- 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)