title: Get UITextView dynamic height with auto layout after setting text
body: <p>I have a UITextView not scrollable with auto layout set by interface builder, and the text increase or decrease dynamically with no problem, but i want know what is the new UITextView height after setting text, i'm trying to do this:</p>
  
  <pre><code>NSLog(@"text before: %.2f",self.myText.frame.size.height);
  [self.myText setText:self.string];
  NSLog(@"text after: %.2f",self.myText.frame.size.height);
  </code></pre>
  
  <p>this is the result:</p>
  
  <pre><code>text before: 47.50
  text after: 47.50
  </code></pre>
  
  <p>the text is increased in the view when i run it, but the size is the same, how i can get the real height after setting text?</p>