Why does UICollectionView log an error when the cells are fullscreen?

Question

I have a UICollectionViewController using a UICollectionViewFlowLayout where my itemSize is the size of the UICollectionView

Answer 1

iOS 11 update: automaticallyAdjustsScrollViewInsets is deprecated in iOS 11.0.

Apple recommends using UIScrollView's contentInsetAdjustmentBehavior method instead. I set this value to .never and the error has gone. You can also set this property in Interface Builder.