Demerro

// https://x.com/SebJVidal/status/1748659522455937213

import SwiftUI

extension View {
    func navigationHeaderView<Content: View>(height: CGFloat = 50.0, @ViewBuilder content: @escaping () -> Content) -> some View {
        overlay {
            NavigationHeaderView(height: height, content: content)
                .frame(width: 0.0, height: 0.0)
        }

Demerro

import UIKit

public final class PagingCollectionView: UICollectionView {
    
    @_nonoverride
    public let collectionViewLayout: UICollectionViewCompositionalLayout = {
        let item = NSCollectionLayoutItem(layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0), heightDimension: .fractionalHeight(1.0)))
        let group = NSCollectionLayoutGroup.vertical(layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0), heightDimension: .fractionalHeight(1.0)), repeatingSubitem: item, count: 1)
        let section = NSCollectionLayoutSection(group: group)
        let configuration = UICollectionViewCompositionalLayoutConfiguration()

Demerro

import UIKit

final class CollectionViewCell: UICollectionViewCell {
    // Required
    override func preferredLayoutAttributesFitting(_ layoutAttributes: UICollectionViewLayoutAttributes) -> UICollectionViewLayoutAttributes {
        layoutAttributes.size = systemLayoutSizeFitting(layoutAttributes.size, withHorizontalFittingPriority: .required, verticalFittingPriority: .fittingSizeLevel)
        return layoutAttributes
    }
}