title: Detect if a user has typed an emoji character in UITextView
body: <p>I have a UITextView and I need to detect if a user enters an emoji character.</p>
  
  <p>I would think that just checking the unicode value of the newest character would suffice but with the new emoji 2s, some characters are scattered all throughout the unicode index (i.e. Apple's newly designed copyright and register logos).</p>
  
  <p>Perhaps something to do with checking the language of the character with NSLocale or LocalizedString values?</p>
  
  <p>Does anyone know a good solution?</p>
  
  <p>Thanks!</p>