ios - The сonstraints do not work on an iPad with collection view

Question

I am using a collection view in a storyboard and I need one ribbon with an image in the center of the screen. Constraints work fine on iPhone, but not iPad. How can this be done?

question from:https://stackoverflow.com/questions/65925471/the-%d1%81onstraints-do-not-work-on-an-ipad-with-collection-view

Answer 1

The collectionView cell size is not specified for different screen sizes.

Use UICollectionViewDelegateFlowLayout's method

func collectionView(_ collectionView: UICollectionView, 
                      layout collectionViewLayout: UICollectionViewLayout, 
               sizeForItemAt indexPath: IndexPath) -> CGSize

https://developer.apple.com/documentation/uikit/uicollectionviewdelegateflowlayout/1617708-collectionview