title: How to split a NSAttributedString
body: <p>I imported a NSAttributedString from a rtf-file and now I want to split it at another given String. With the <code>attributedSubstring</code> method you get one attributedSubstring as result, but I want to split it at every part, where the other String appeares, so the result should be an Array of NSAttributedStrings.
  Example:<br>
  <code>var source = NSAttributedString(string: "I*** code*** with*** swift")
   var splitter = "***"
   var array = //The method I am looking for
  </code>
  The result should be the following Array(with attributedStrings): [I, code, with, swift]</p>