# enumerateSubstrings(from:options:using:) Enumerates the textual segment boundaries starting at the location you specify. ``` func enumerateSubstrings(from location: any NSTextLocation, options: NSString.EnumerationOptions = [], using block: (String?, NSTextRange, NSTextRange?, UnsafeMutablePointer) -> Void) ``` ## Parameters `location` The location where the enumeration starts. `options` One or more of the available . `block` A closure to invoke to evaluate the substrings; end the enumeration early by returning `false`. ## 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)