在AVCam中添加一个UICollectionView覆盖。

So I Have an AVCamViewController that I am using to take pictures. The background is a live image feed and Overlaid on top is a button to take a picture and a UIImageView to display the picture taken. These both work. I want to have a side scrolling collectionView to display all of the pictures taken but I can't seem to add the collectionView to the overlay View, even though adding the buttons and UIImageView were no problem. Here is the implementation code for the view controller's view did load method:So I Have an AVCamViewController that I am usin