title: How do I assign a default value to a UITextField?
body: <p>My iOS app crashes every time a user hits 'next' when one of the fields (they're strings) is empty.  How do I make it to where this doesn't happen?</p>
  
  <pre><code>emailBody = [emailBody stringByAppendingString:nameField.text];
  </code></pre>
  
  <p>Here's one of the lines that is causing the crash; it's trying to pull the data from nameField.text, but in some cases it's empty and this crashes it.</p>