title: UILabel with numberOfLines and lineBreakMode
body: <p>I am working on a project that has to support both iOS6 and iOS7. My problem is it works different on different systems. I'm trying to create UILabel with number of lines equal to 2, but when I set it's line break mode to NSLineBreakByTruncatingTail it works different.</p>
  
  <p>Explanation (numberOfLines = 2, text = @"long teeexxxttt"):</p>
  
  <pre><code>    iOS7                    iOS6
        NSLineBreakByWordWrapping
   ----------              ----------
  |long      |            |long      |
  |teeeexxxtt|            |teeeexxxtt|
   ----------              ----------
  
       NSLineBreakByTruncatingTail
   ----------              ----------
  |long      |            |long te...|
  |teeeexx...|            |          |
   ----------              ----------
       ^                       ^
       |                       |
    correct                incorrect - shows only one line
  </code></pre>
  
  <p>How do I fix it?</p>