title: Collectionview Fixed Cell Spacing
body: <p>I've been looking for how to make <code>UICollectionView</code> have a fixed spacing between its cells, but have not found a solution so far. </p>
  
  <p>I have a <code>UICollectionView</code> which consists of two columns, and all the cells have the same width, but they vary in height. I have only one section in this <code>UICollectionView</code>.</p>
  
  <p>I have set the minimum spacing to 10(which is the value I want between cells vertically), but the system is seemingly randomly stretching the vertical space.</p>
  
  <p>What I would like to achieve, is the effect Wikipedia for iPad has: different article tiles with the same width, but adjustable height according to need, yet all the cells are spaces evenly vertically. (I don't mind leaving space at the very end, but I don't want extra spaces in the middle)</p>
  
  <p>How should I achieve this? I would accept third-party libraries if it is easy to migrate existing <code>UICollectionViews</code>(and it's open-source, of course). </p>