Regex for url with port in Objective c

Here is the code I'm using, it validates 99% of the urls I give it, b开发者_如何学JAVAut it fails when there is a ":port" after an IP address in the URL.

-(BOOL) validateUrl: (NSString *) candidate {


//NSString *urlRegEx=@"(http|https)://(((\\w)*|([0-9]*)|([-|_])*)+([\\.|/]((\\w)*|([0-9]*)|([-|_])*))+)|(";
NSString *urlRegEx = @"^(http|https|ftp)\://(([a-zA-Z0-9-.]+\.[a-zA-Z]{2,3})|([0-2]*\d*\d\.[0-2]*\d*\d\.[0-2]*\d*\d\.[0-2]*\d*\d))(:[a-zA-Z0-9]*)?/?([a-zA-Z0-9-._\?\,\'/\+&%\$#\=~])*[^.\,)(\s]$";
NSPredicate *urlTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", urlRegEx]; 
return [urlTest evaluateWithObject:candidate];

}

thanks for the help!

Why not use NSURL? Try creating a URL with URLWithString: and if it returns nil, your URL was malformed. If you don’t get nil in return, then you can check the host, port, etc.