Creates and returns an NSURL object initialized with a base URL and a relative string.
SDKs
- iOS 2.0+
- macOS 10.0+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
Framework
- Foundation
Declaration
Parameters
URLStringThe URL string with which to initialize the NSURL object. May not be
nil. Must conform to RFC 2396.URLStringis interpreted relative tobase.URL baseURLThe base URL for the NSURL object.
Return Value
An NSURL object initialized with URLString and base. If URLString was malformed or nil, returns nil.
Discussion
This method allows you to create a URL relative to a base path or URL. For example, if you have the URL for a folder on disk and the name of a file within that folder, you can construct a URL for the file by providing the folder’s URL as the base path (with a trailing slash) and the filename as the string part.
This method expects URLString to contain only characters that are allowed in a properly formed URL. All other characters must be properly percent escaped. Any percent-escaped characters are interpreted using UTF-8 encoding.