# appendingPathComponent(_:isDirectory:) Returns a URL by appending the specified path component to self, specifying whether the resulting path is a directory. ``` func appendingPathComponent(_ pathComponent: String, isDirectory: Bool) -> URL ``` ## Parameters `pathComponent` The path component to add. `isDirectory` If `true`, the method treats the path component as a directory. ## Return Value A new URL with the path component appended. ## Discussion The URL syntax for a directory and for a file at otherwise the same location are slightly different — directory URLs must end in `/`. If you append the path component `second` to the URL `http://www.example.com/first/`, if `isDirectory` is `true`, the resulting URL is `http://www.example.com/first/second/.` If `isDirectory` is `false`, the resulting URL is `http://www.example.com/first/second`. This difference is particularly important if you resolve another URL against this new URL. For example, the path component `file.html` relative to `http://www.example.com/first/second` is `http://www.apple.com/first/file.html`, whereas relative to `http://www.example.com/first/second/`, it’s `http://www.example.com/first/second/file.html`. New code should use [`appending(path:directoryHint:)`](/documentation/Foundation/URL/appending(path:directoryHint:)) instead of this method. --- 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)