A method for debugging NSURLs to find where the different pieces of your URL are

NSURL+Pieces.h

#import <Foundation/Foundation.h>

@interface NSURL (Pieces)
-(NSDictionary *)piecesDictionary;
@end

NSURL+Pieces.m

#import "NSURL+Pieces.h"

@implementation NSURL (Pieces)

-(NSDictionary *)piecesDictionary{
	NSMutableDictionary *dictionary = [NSMutableDictionary dictionary];
#define AddValueForSelector(__selector) do{ id obj = [self performSelector:NSSelectorFromString(__selector)]; if(obj) [dictionary setObject:obj forKey:__selector]; }while(0)
	AddValueForSelector(@"absoluteString");
	AddValueForSelector(@"absoluteURL");
	AddValueForSelector(@"baseURL");
	AddValueForSelector(@"fragment");
	AddValueForSelector(@"host");
	AddValueForSelector(@"lastPathComponent");
	AddValueForSelector(@"parameterString");
	AddValueForSelector(@"password");
	AddValueForSelector(@"path");
	AddValueForSelector(@"pathComponents");
	AddValueForSelector(@"pathExtension");
	AddValueForSelector(@"port");
	AddValueForSelector(@"query");
	AddValueForSelector(@"relativePath");
	AddValueForSelector(@"relativeString");
	AddValueForSelector(@"resourceSpecifier");
	AddValueForSelector(@"scheme");
	AddValueForSelector(@"standardizedURL");
	AddValueForSelector(@"user");
#undef AddValueForSelector
	return dictionary;
}

@end

Sample output by NSLogging this call for "http://apple.com/imac/":

{ absoluteString = "http://apple.com/imac/"; absoluteURL = "http://apple.com/imac/"; host = "apple.com"; lastPathComponent = imac; path = "/imac"; pathComponents = ( "/", imac ); pathExtension = ""; relativePath = "/imac"; relativeString = "http://apple.com/imac/"; resourceSpecifier = "//apple.com/imac/"; scheme = http; standardizedURL = "http://apple.com/imac/"; }