I lost % in html source when using stringWithContentsOfUrl

NSString *htmlSource = [NSString stringWithContentsOfURL:[NSURL URLWithString:urlString] encoding:0x80000000 + kCFStringEncodingDOSKorean error:nil];
 NSLog(htmlSource);

I get html result tag like (col width="16"/)~~~ but the real html tag is (col width="16%"/)

% character disappears. what is problem?

The string might still contain a %; NSLog() itself gives special significance to a % sign (consider what happens if you use %@, %d, etc.).

Try doing this: NSLog(@"%@", htmlSource); that will log only an object (the string) and keep it out of the formatting argument.