title: Autolayout UIView Proportional height with Minimum height requirement
body: <p>I've created one Tab bar bottom view with proportional height related to main superview.<br>
  <a href="https://i.stack.imgur.com/YrsEG.png" rel="noreferrer"><img src="https://i.stack.imgur.com/YrsEG.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/tR18I.png" rel="noreferrer"><img src="https://i.stack.imgur.com/tR18I.png" alt="enter image description here"></a></p>
  
  <p>Whereas, tab bar bottom view height in 6+ -> 59, in 6 -> 53, in 5 -> 45 &amp; in 4s -> 38. It's working proportionally fine. But what if I want this tab bar view's height should be minimum 46, at maximum it should work proportionally. </p>
  
  <p>So based on the above heights on different devices, I want to achieve 6+ -> 59, 6 -> 53, 5 -> 46 &amp; in 4s -> 46.  </p>
  
  <p>So what could be a possible solution in Auto layout to achieve this.<br>
  Thanks in Advance. </p>