title: iOS from UTF8 to ISO-8859-1
body: <p>In Java code, this code can get hex string <code>"efbfbc"</code>;</p>
  
  <pre><code>new String((((char)-4 )+ "").getBytes("utf8"),"iso8859-1")
  </code></pre>
  
  <p>How can implement it in iOS Objective-C?</p>
  
  <p>by byte -4, get hex string <code>"efbfbc"</code>;</p>