title: Get number of lines UITextView without using "\n"?
body: <p>I have a textView that I need the number of lines for, or the sizeToFit before it becomes sizeToFit.  I've tried checking for number of line breaks "\n" in the textView.  However, the text in the textView has been parsed bc it was pretty messy coming from the server with tons of html codes and awful line breaks that I had to use replaceOccurence of "\n" to remove the line breaks to make the text into one nice paragraph.  </p>
  
  <pre><code>var rawString = self.selectedProduct.description   
  var cleanString = rawString?.stringByReplacingOccurrencesOfString("\n", withString: " ", options: NSStringCompareOptions.LiteralSearch, range: nil)
  </code></pre>
  
  <p>This code, of course, will only return 1 after the above code. </p>
  
  <pre><code>let desString = self.descriptionTextView.text
  let numLines = desString.componentsSeparatedByString("\n")
  println(numLines.count)
  </code></pre>
  
  <p>This code, crashes. </p>
  
  <pre><code> let numLines = self.descriptionTextView.contentSize.height / self.descriptionTextView.font.leading
  </code></pre>
  
  <p>Ultimately, what I want to partially show the text and have a button that reveals all the text.</p>
  
  <p>Thanks </p>