title: How to set back button text in Swift
body: <p>How do you remove the back button text.</p>
  
  <p>Current back button:</p>
  
  <blockquote>
    <p>&lt; Back</p>
  </blockquote>
  
  <p>Desired back button:</p>
  
  <blockquote>
    <p>&lt; AnythingElse</p>
  </blockquote>
  
  <p>None of these have worked:</p>
  
  <pre><code>self.navigationItem.backBarButtonItem?.title = "Back"
  self.backItem?.title = ""
  self.navigationController?.navigationBar.backItem?.title = ""
  self.navigationItem.backBarButtonItem?.title = ""
  self.navigationController?.navigationItem.backBarButtonItem?.title="Back"
  self.navigationController?.navigationBar.backItem?.title = ""
  self.navigationController?.navigationItem.backBarButtonItem?.title
  </code></pre>