title: How to fit text in a circle in UILabel
body: <p>I'd like to flow the text in <code>UILabel</code> into a circle (instead of rect).
  I did some experiments with <code>NSLayoutManager</code>, <code>NSTextContainer</code> and <code>NSTextStorage</code> but it does not seem to work.
  The example below is supposed to flow the text into a smaller rect of 40x40 (label is 120x120) but does not seem to have any effect.</p>
  
  <pre><code>UIFont *font = [UIFont fontWithName:@"HelveticaNeue" size:12];
  NSTextStorage *ts = [[NSTextStorage alloc] initWithString:multiline.title attributes:@{NSFontAttributeName:font}];
  NSLayoutManager *lm = [[NSLayoutManager alloc] init];
  NSTextContainer *tc = [[NSTextContainer alloc] initWithSize:CGSizeMake(40, 40)];
  [lm addTextContainer:tc];
  [ts addLayoutManager:lm];
  self.label.attributedText = ts;
  </code></pre>
  
  <p>Ides?</p>