title: Custom Keyboard: get text from input view
body: <p>i have developed a custom keyboard app of iOS8. and i can't get the text from input view. any help will be appreciated .
   have tried to use </p>
  
  <pre><code> - (void)textDidChange:(id&lt;UITextInput&gt;)textInput {} 
  </code></pre>
  
  <p>delegate to get text. but it returns null value. i don't have another idea from which i can get text from input view 
  thanks in advance</p>