title: What is UIAccessibilityTraitUpdatesFrequently in iOS UIAccessibility?
body: <p>I'm developing application which is also for blind people. I'm using UITextField, where 508/VA(Professional Testing team) asking us to implement <code>UIAccessibilityTraitUpdatesFrequently</code>. I went through documentation from Apple, but I didn't got any methods where I can observe <code>UIAccessibilityTraitUpdatesFrequently</code> notification.</p>
  
  <p>I have same kind question like </p>
  
  <p><a href="https://stackoverflow.com/questions/13920012/uitextview-setup-for-voice-over-to-select-read-by-paragraph">UITextView setup for Voice Over to select/read by paragraph</a></p>
  
  <p><a href="https://stackoverflow.com/questions/19158796/accessibilitytraits-support-in-ios-7">accessibilityTraits support in ios 7</a></p>
  
  <p>but I'm not getting how to use this <code>UIAccessibilityTraitUpdatesFrequently</code>.I'm not getting any notification method for this.</p>
  
  <p>Your help will be appreciated.</p>