collection-view-layout-pattern-sample

UICollectionViewLayout implementation pattern.

About

This project is introduced in iOSDC Japan 2021.
sample code for slide

Pattern

list	grid	mosaic	topAligned	detail

• only the list pattern is using iOS 14.0+ API

detail patten

use DetailSectionProvider protocol

protocol DetailSectionProvider {
    func layoutSection(contentWidth: CGFloat, traitCollection: UITraitCollection) -> NSCollectionLayoutSection
    func provideCell(_ collectionView: UICollectionView, indexPath: IndexPath, item: DetailSectionItem) -> UICollectionViewCell
    func provideHeaderView(_ collectionView: UICollectionView, indexPath: IndexPath, section: DetailSection) -> UICollectionReusableView?
    func provideFooterView(_ collectionView: UICollectionView, indexPath: IndexPath, section: DetailSection) -> UICollectionReusableView?
}

struct DetailSectionModel {
    var provider: DetailSectionProvider
    var section: DetailSection
    var items: [DetailSectionItem]
}

Requirements

Requires Xcode12 and iOS 14.0 or later.