title: UICollectionView mosaic layout
body: <p>I need to create a mosaic layout for an app. It would be wonderful to have a completely dynamic layout, similar to the one in the pic below: </p>
  
  <p><a href="https://i.stack.imgur.com/lcQUy.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/lcQUy.jpg" alt="enter image description here"></a></p>
  
  <p>I'm using <a href="https://github.com/chiahsien/CHTCollectionViewWaterfallLayout" rel="nofollow noreferrer">this library</a> that is really cool, but allows to have only dynamic height. Is there some library out there or is there a way to achieve this result? 
  Thank you!</p>