# CTLineEnumerateCaretOffsets(_:_:) Enumerates caret offsets for characters in a line. ``` func CTLineEnumerateCaretOffsets(_ line: CTLine, _ block: @escaping (Double, CFIndex, Bool, UnsafeMutablePointer) -> Void) ``` ## Parameters `line` The line to enumerate. `block` The block to invoke once for each logical caret edge in the line, in left-to-right visual order. The block’s `offset` parameter is relative to the line origin. The block’s `leadingEdge` parameter specifies logical order. --- 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)