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Relative Strings

NSURL is fully equipped to resolve relative strings against another URL, but sadly there's no API to go in the opposite direction. KSURLUtilities to the rescue!

- (NSString *)ks_stringRelativeToURL:(NSURL *)URL;
- (NSURL *)ks_URLRelativeToURL:(NSURL *)URL;

How's this work? Well, everyone loves examples right?

Receiver relativeToURL: Return Value foo/bar/ foo/example.png ../../ ../../baz/index.xml

Query Parameters

It's common for URLs to split their query string up into a dictionary-like series of parameters. e.g.

KSURLUtilities has an easy solution for getting that into a more Cocoa-friendly form:

- (NSDictionary *)ks_queryParameters;

There are also APIs for creating/deriving new URLs from a dictionary:

- (NSURL *)ks_URLWithQueryParameters:(NSDictionary *)parameters;

+ (NSURL *)ks_URLWithScheme:(NSString *)scheme
                       host:(NSString *)host
                       path:(NSString *)path
            queryParameters:(NSDictionary *)parameters;

URL Paths

Mac OS X 10.6 gave us a bunch of new URL methods like -URLByDeletingLastPathComponent. If you wanted access to this behaviour before, it necessitated much tedious mucking about with NSString path methods, or using CFURL functions. KSURLUtilities gives simple Cocoa APIs for all these tasks on 10.5 and earlier:

- (NSString *)ks_lastPathComponent;
- (NSString *)ks_pathExtension;
- (NSURL *)ks_URLByAppendingPathExtension:(NSString *)pathExtension;
- (NSURL *)ks_URLByDeletingLastPathComponent;
- (NSURL *)ks_URLByDeletingPathExtension;
- (BOOL)ks_hasDirectoryPath;
- (NSURL *)ks_URLByAppendingPathComponent:(NSString *)pathComponent isDirectory:(BOOL)isDirectory;


Nothing fancy here, just a few additions to the built-in -[NSURL host] method.

- (NSURL *)ks_hostURL;

Strips a URL down to nothing but its scheme and host. e.g. becomes

- (NSArray *)ks_domains;

Splits the host up into its domains. e.g. gives (www, karelia, com)


A basic NSFormatter subclass for handling URLs.

  • Non-complete URLs like example and generate full URL
  • Host URLs have a slash appended to them. e.g. is displayed/interpreted as
  • Convenience +URLFromString method that takes care of unescaped characters


A simple class that represents a URL, optionally with a title attached. Features:

  • Handles Web Location files (e.g. those created by dragging a URL from Safari)
  • NSCoding
  • NSCopying

You can pull in the WebKit.framework-dependent KSWebLocationPasteboardAdditions too, to (unsurprisingly) gain support for reading and writing Web Locations from/to the pasteboard.

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