private UICollectionViewLayout CreateLayout()
{
var layout = new UICollectionViewCompositionalLayout((sectionIndex, layoutEnvironment) =>
{
var sectionKind = EnumExtensions.FindByValue <Section>((byte)sectionIndex);
var columns = sectionKind.ColumnCount(layoutEnvironment.Container.EffectiveContentSize.Width);
var itemSize = NSCollectionLayoutSize.Create(
width: CreateFractionalWidth(1.0f),
height: CreateFractionalHeight(1.0f));
var item = NSCollectionLayoutItem.Create(itemSize);
item.ContentInsets = new NSDirectionalEdgeInsets(top: 2, leading: 2, bottom: 2, trailing: 2);
var groupHeight = layoutEnvironment.TraitCollection.VerticalSizeClass == UIUserInterfaceSizeClass.Compact
? CreateAbsolute(44)
: CreateFractionalWidth(0.2f);
var groupSize = NSCollectionLayoutSize.Create(
width: CreateFractionalWidth(1.0f),
height: groupHeight);
var group = NSCollectionLayoutGroup.CreateHorizontal(layoutSize: groupSize, subitem: item, count: columns);
var section = NSCollectionLayoutSection.Create(group);
section.ContentInsets = new NSDirectionalEdgeInsets(top: 20, leading: 20, bottom: 20, trailing: 20);
return(section);
});
return(layout);
}