How to Really Encode URL

Apparently there is an issue with stringByAddingPercentEscapesUsingEncoding.  It doesn't escape things like +,&,/.  To escape a string properly for a URL, use the following:



NSString * encodedString = (NSString *)CFURLCreateStringByAddingPercentEscapes(
NULL,
(CFStringRef)unencodedString,
NULL,
(CFStringRef)@"!*'();:@&=+$,/?%#[]",
kCFStringEncodingUTF8 );



This was found here: http://simonwoodside.com/weblog/2009/4/22/how_to_really_url_encode/
Using search terms: obj c encode url