# withUnsafeBytes(_:) Calls the given closure with a pointer to the underlying bytes of the region’s contiguous storage. ``` func withUnsafeBytes(_ body: (UnsafeRawBufferPointer) throws -> ResultType) rethrows -> ResultType ``` --- 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)