title: Drop Down In UICollectionview
body: <p>I have a collection view controller and displaying the data in UICollectionView Cells. However, I would like to filter the data. For that, we want to create two dropdown boxes on top as shown in the following image. If user selects a value from one of the dropdowns..the data being shown in collection view needs to be filtered.</p>
  
  <p><img src="https://i.stack.imgur.com/Po8Sg.png" alt="enter image description here"></p>
  
  <p>I am trying to use vppdropdown. However, I am unable to add it to my collection view. Any help in this regard is greatly needed.</p>
  
  <p>Thanks in Advance.</p>