title: xcode ios HMAC SHA 256 hashing
body: <p>So I'm trying to figure out how to do a hmacshad256 hash on ios as that's the hash I did for the wcf service api I made. I've been trying to look for some info about it but would usually just end up getting a SHA-256 hash. </p>
  
  <p>This is the only reference I have:</p>
  
  <p><a href="https://stackoverflow.com/questions/8458917/need-to-generate-hmac-sha256-hash-in-objective-c-as-in-java">Need to generate HMAC SHA256 hash in Objective C as in Java</a></p>
  
  <p>And I'm not sure if that's the only way to do it (importing a java hmac class)</p>
  
  <p>Any help is appreciated.</p>
  
  <p>Thanks!</p>