title: automatic multiline label swift
body: <p>I have a label and I insert text in it. The label has a size but my problem is this:</p>
  
  <p>when I insert text in label if the text is longer than label'size appears "...." in the label; for example:</p>
  
  <p>if complete string that I want insert in the label is this : <code>"hello world how are you?"</code></p>
  
  <p>in the label I see this <code>"hello world..."</code></p>
  
  <p>I would like that label wraps automatically.</p>
  
  <p>For this reason I did this but it doesn't work:</p>
  
  <pre><code>label!.textAlignment = NSTextAlignment.Center;
  label!.numberOfLines = 0;
  label!.font = UIFont.systemFontOfSize(16.0);
  label!.text = "hello world how are you?"
  </code></pre>
  
  <p>Where do I wrong?</p>