ios - Looking for OC or swift string XOR checksum calculation method

Question

I have a string DCDS,1,0. How do I calculate the result of its XOR checksum? The requirements are: Convert the high and low four digits of hexadecimal into two ASCII characters (0-9, A-F ), high position first, low position last;

For example, "CCZDC,1," the checksum is: 6C

Answer 1

You can do it with unicodeScalars