title: Dynamically change UILabel width not work with autolayout
body: <p>I have some code:</p>
  
  <pre><code>CGRect currentFrame = textLabel.frame;
  CGSize max = CGSizeMake(textLabel.frame.size.width, 3000);
  CGSize expected = [[textLabel text] sizeWithFont:textLabel.font constrainedToSize:max lineBreakMode:textLabel.lineBreakMode];
  currentFrame.size.height = expected.height;
  textLabel.frame = currentFrame;
  
  expected.height = expected.height + 70;
  
  [scrollView setContentSize:expected];
  </code></pre>
  
  <p>textLabel placed inside UIScrollView to display multiline text information.</p>
  
  <p>In older version of application, without 4-inch screen support, everything was perfect.
  But now, unfortunately, resizing UILabel does not work.</p>
  
  <p>Maybe, somebody can advice me, what should I change?</p>
  
  <p>Thanks.</p>