Returns the parameter string from a given URL.


func CFURLCopyParameterString(_ anURL: CFURL!, _ charactersToLeaveEscaped: CFString!) -> CFString!



The CFURL object to examine.


Characters whose percent escape sequences, such as %20 for a space character, you want to leave intact. Pass NULL to specify that no percent escapes be replaced, or the empty string (CFSTR("")) to specify that all be replaced.

Return Value

The parameter string (as defined in RFC 1738), or NULL if no parameter string exists. For example, in the URL myproto://;command=laugh, the parameter string is command=laugh. Ownership follows the create rule. See The Create Rule.


This function removes all percent escape sequences except those for characters specified in charactersToLeaveEscaped.

See Also

Accessing the Parts of a URL

func CFURLCanBeDecomposed(CFURL!) -> Bool

Determines if the given URL conforms to RFC 1808 and therefore can be decomposed.

func CFURLCopyFragment(CFURL!, CFString!) -> CFString!

Returns the fragment from a given URL.

func CFURLCopyHostName(CFURL!) -> CFString!

Returns the host name of a given URL.

func CFURLCopyLastPathComponent(CFURL!) -> CFString!

Returns the last path component of a given URL.

func CFURLCopyNetLocation(CFURL!) -> CFString!

Returns the net location portion of a given URL.

func CFURLCopyPassword(CFURL!) -> CFString!

Returns the password of a given URL.

func CFURLCopyPath(CFURL!) -> CFString!

Returns the path portion of a given URL.

func CFURLCopyPathExtension(CFURL!) -> CFString!

Returns the path extension of a given URL.

func CFURLCopyQueryString(CFURL!, CFString!) -> CFString!

Returns the query string of a given URL.

func CFURLCopyResourceSpecifier(CFURL!) -> CFString!

Returns any additional resource specifiers after the path.

func CFURLCopyScheme(CFURL!) -> CFString!

Returns the scheme portion of a given URL.

func CFURLCopyUserName(CFURL!) -> CFString!

Returns the user name from a given URL.

func CFURLGetPortNumber(CFURL!) -> Int32

Returns the port number from a given URL.

func CFURLHasDirectoryPath(CFURL!) -> Bool

Determines if a given URL's path represents a directory.