title: Stack view - but with "proportional" gaps
body: <p>Imagine a stack view with four items, filling something. (Say, filling the screen).</p>
  <p>Notice there are <strong>three</strong> gaps, ABC.</p>
  <p><a href="https://i.stack.imgur.com/xylA7.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xylA7.png" alt="enter image description here" /></a></p>
  <h1>(Note - the yellow blocks are always some fixed height each.)</h1>
  <h1>(Only the <em>gaps</em> change, depending on the overall height available to the stack view.)</h1>
  <p>Say UISV is able to draw everything, with say 300 left over.  The three gaps will be 100 each.</p>
  <p>In the example, 9 is left over, so A B and C are 3 each.</p>
  <p>However.</p>
  <p>Very often, you want the <em>gaps themselves</em> to enjoy a <em>proportional relationship</em>.</p>
  <p>Thus - your designer may say something like</p>
  <blockquote>
  <p>If the screen is too tall, expand the spaces at A, B and C. However. Always expand B let's say 4x as fast as the gaps at A and B.&quot;</p>
  </blockquote>
  <p>So, if &quot;12&quot; is left over, that would be 2,8,2.  Whereas when 18 is left over, that would be 3,12,3.</p>
  <p>Is this concept available in stack view?  Else, how would you do it?</p>
  <p>(Note that recently added to stack view, you can indeed specify the gaps individually. So, it would be possible to do it &quot;manually&quot;, but it would be a real mess, you'd be working against the solver a lot.)</p>