title: Creating a future date in swift with NSDate()
body: <p>I'm getting an error: "Missing argument for parameter 'coder' in call" for the following code:</p>
  
  <pre><code>var components = NSDateComponents()     
  components.setValue(1,forComponent: NSCalendarUnit.CalendarUnitMonth);
  var expirationDate = NSCalendar.currentCalendar().dateByAddingComponents(components,       toDate: NSDate(),options:0)
  </code></pre>
  
  <p>The docs calls for:</p>
  
  <pre><code>NSCalendar.currentCalendar().dateByAddingComponents(&lt;#comps: NSDateComponents?#&gt;, toDate: &lt;#NSDate?#&gt;, options: &lt;#NSCalendarOptions#&gt;)
  </code></pre>
  
  <p>Can anyone see what I'm missing? I don't see a parameter named 'coder' required.</p>