title: swift 3 - ios : convert anyObject to string
body: <p>How could we convert anyobject to string in swift 3, it's very easy in the older version by using.</p>
  
  <pre><code>var str = toString(AnyObject)
  </code></pre>
  
  <p>I tried <code>String(AnyObject)</code> but the output is always optional, even when i'm sure that AnyObject is not a optional value.</p>