title: 'String" is not convertible to '[(String)]'
body: <p>I am trying to split a string returned from a URL by ", " but when I attempt</p>
  
  <pre><code>var tagArray = [String]()
  if response.responseObject != nil {
                  let data = response.responseObject as NSData
                  let str = NSString(data: data, encoding: NSUTF8StringEncoding)!
                  self.tagArray = str.componentsSeparatedByString(", ") as String
                  println("response: \(self.tagArray)") //prints the HTML of the page
              }
  </code></pre>
  
  <p>The line <code>self.tagArray = str.componentsSeparatedByString(", ") as String</code> throws the error "'String" is not convertible to '[(String)]'"</p>
  
  <p>Anyone know how to properly split the string into the array?</p>