title: Limit number of lines in UITextView
body: <p>I'm using UITextView in my application, i want user to enter maximum 5 lines of text, I've been spending a few days on google but still have no luck, can some one please help!!</p>
  
  <p>PS: Not limit number of characters but number of "LINES"</p>
  
  <p>I've tried finding number of lines and use this method <code>textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text</code> , return NO when limit is reached but the back space button doesn't work after limit reached.</p>
  
  <p>Thanks!</p>