# url(for:) Returns a URL for the specified relative path. ``` nonisolated func url(for path: FilePath) throws -> URL ``` ## Parameters `path` The relative path. ## Return Value The URL to the item. ## Discussion> Warning: Don’t persist the returned URL beyond the lifetime of the current process. > Note: This method will return a well formed URL even if no item exists at the specified relative path in any asset pack, in which case any attempts to get its contents—whether it’s a file or a directory—will fail. All asset packs share the same namespace, so you can treat the overall collection of downloaded asset packs as if it were a single root directory that contains all of your subdirectories and asset files, regardless of the specific asset pack in which any particular file resides. Unlike [`contents(at:searchingInAssetPackWithID:options:)`](/documentation/BackgroundAssets/AssetPackManager/contents(at:searchingInAssetPackWithID:options:)) and [`descriptor(for:searchingInAssetPackWithID:)`](/documentation/BackgroundAssets/AssetPackManager/descriptor(for:searchingInAssetPackWithID:)), this method supports retrieving entire directories—including packages—in which case it merges the corresponding slices of the shared logical directory from all downloaded asset packs that contain such slices. If there’s a path collision across multiple asset packs, then it’s undefined from which asset pack an individual file will be resolved. > Warning: This method is less efficient than are ``doc://com.apple.backgroundassets/documentation/BackgroundAssets/AssetPackManager/contents(at:searchingInAssetPackWithID:options:)`` and ``doc://com.apple.backgroundassets/documentation/BackgroundAssets/AssetPackManager/descriptor(for:searchingInAssetPackWithID:)``; use those methods instead if you can do so. In particular, this method shouldn’t be used to get the URL to the root of the shared asset-pack namespace. Don’t use this method to block the main thread. > Throws: When the path isn’t relative or when some other error occurs while finding the requested item. --- 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)