//prepar request
	NSString *urlString = [NSString stringWithFormat:@"http://urlToSend.com"];
	NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
	[request setURL:[NSURL URLWithString:urlString]];
	[request setHTTPMethod:@"POST"];

        //set headers
	NSString *contentType = [NSString stringWithFormat:@"text/xml"];
	[request addValue:contentType forHTTPHeaderField: @"Content-Type"];

	//create the body
	NSMutableData *postBody = [NSMutableData data];
	[postBody appendData:[[NSString stringWithFormat:@"<xml>"] dataUsingEncoding:NSUTF8StringEncoding]];
	[postBody appendData:[[NSString stringWithFormat:@"<yourcode/>"] dataUsingEncoding:NSUTF8StringEncoding]];
	[postBody appendData:[[NSString stringWithFormat:@"</xml>"] dataUsingEncoding:NSUTF8StringEncoding]];

        //post
	[request setHTTPBody:postBody];

	//get response
	NSHTTPURLResponse* urlResponse = nil;  
	NSError *error = [[NSError alloc] init];  
	NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&urlResponse error:&error];  
	NSString *result = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
	NSLog(@"Response Code: %d", [urlResponse statusCode]);
	if ([urlResponse statusCode] >= 200 && [urlResponse statusCode] < 300) {
		NSLog(@"Response: %@", result);
	        
                //here you get the response

	}

实在是太感谢了！