title: Filestream equivalent in Swift
body: <p>I'm having a little bit of trouble. I'm translating my App to native Swift Language. I was using AS3. What I want to accomplish is to read a file in binary mode. A snippet of what I want accomplish is this:</p>
  
  <pre><code>ba:FileStream
  ba.open(someFile, readMode)
  ba.endian = "littleEndian"
  ba.position = 128
  ba.readMultiByte(4, someVariableHere)
  </code></pre>