+ (NSString *) stringByReplaceUnicode:(NSString *)string

{

    NSMutableString *convertedString = [string mutableCopy];

    [convertedString replaceOccurrencesOfString:@"\\U" withString:@"\\u" options: range:NSMakeRange(, convertedString.length)];

    CFStringRef transform = CFSTR("Any-Hex/Java");

    CFStringTransform((__bridge CFMutableStringRef)convertedString, NULL, transform, YES);

    return convertedString;

}

-(NSString *)URLEncodedString

{

    NSString *encodedString = (NSString *)

    CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,

                                                              (CFStringRef)self,

                                                              NULL,

                                                              (CFStringRef)@"!*'();:@&=+$,/?%#[]",

                                                              kCFStringEncodingUTF8));

    return encodedString;

}

-(NSString *)URLDecodedString

{

    NSString *decodedString=(__bridge_transfer NSString *)CFURLCreateStringByReplacingPercentEscapesUsingEncoding(NULL, (__bridge CFStringRef)self, CFSTR(""), CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding));

    return decodedString;

}