title: swift How to remove optional String Character
body: <p>How do I remove Optional Character</p>
  
  <hr>
  
  <pre><code>let color = colorChoiceSegmentedControl.titleForSegmentAtIndex(colorChoiceSegmentedControl.selectedSegmentIndex)
  
  println(color) // Optional("Red")
  
  let imageURLString = "http://hahaha.com/ha.php?color=\(color)"
  println(imageURLString)
  //http://hahaha.com/ha.php?color=Optional("Red")
  </code></pre>
  
  <hr>
  
  <p>I just want output "<a href="http://hahaha.com/ha.php?color=Red" rel="noreferrer">http://hahaha.com/ha.php?color=Red</a>"</p>
  
  <p>How can I do?</p>
  
  <p>hmm....</p>