title: Multiline UILabel with UIScrollview using autolayout
body: <p>I read many post of <code>contentview</code> in <code>scrollview</code>,but the problem is slightly different.check out the image</p>
  
  <p><img src="https://i.stack.imgur.com/fHr57.png" alt="enter image description here"><br>
    and i have following hierarchy    </p>
  
  <p><img src="https://i.stack.imgur.com/nlKq0.png" alt="enter image description here"></p>
  
  <p>Here the <code>label</code> is <code>multiline label</code> and its fill up with too many content size.<br>
  so, the problem is<br>
     1. according to the lines of the <code>label</code>, height of <code>label</code> changes and<br>
  2. accoring to height of <code>label</code>, <code>contentview</code> height changes.
  so, that it scrolls. and i want this things to be done with <code>autolayout</code>.<br>
  And one thing i want to mention is , i'm using ios <code>8.1</code> and xcode <code>6.1</code></p>