Objective-C Unicode Escaping + JSON

gistfile1.txt

/**
 * LP: Escape Unicode for json string object
 */
-(NSString*)escapeUnicodeWithString:(NSString*)stringToEscape {
    
    NSError *error;
    NSString *escapedString;
    escapedString = [stringToEscape JSONStringWithOptions:JKSerializeOptionEscapeUnicode includeQuotes:YES error:&error];
    
    if(error) {
        return stringToEscape;
    }
    
    return [(NSString *)CFURLCreateStringByAddingPercentEscapes(NULL,
                                                                (CFStringRef)escapedString,
                                                                NULL,
                                                                (CFStringRef)@"!*'();:@&=+$,/?%#[]",
                                                                kCFStringEncodingUTF8 ) autorelease];

}