Здравствуйте! Друзья, есть проблема, которую не могу понять. indexPath.section == 0 в методе didSelectItemAt возвращает false, несмотря на то, что по нулевому индексу есть значение. В остальных методах cellForItemAt и numberOfItemsInSection indexPath.section == 0 возвращает значение. В чем может быть причина?
final class MenuPageViewController: UIViewController {
// MARK: - Public
var pageTitle: String? {
didSet {
navigationItem.title = pageTitle
}
}
var model: [CollectionViewCellModel] = []
// MARK: - Private
private var categoriesViewModel: CategoriesViewModel!
private var menuViewModel: MenuViewModel!
private var categories: [ListOfCategories] = [
ListOfCategories(name: "Всё меню"),
ListOfCategories(name: "Салаты"),
ListOfCategories(name: "C рисом"),
ListOfCategories(name: "C рыбой"),
ListOfCategories(name: "Роллы")
]
private var categorySelectedIndex = 0
// MARK: - UI
private lazy var collectionView: UICollectionView = {
let collectionView = UICollectionView(frame: .zero, collectionViewLayout: layout())
collectionView.register(
MenuCollectionViewCell.self,
forCellWithReuseIdentifier: MenuCollectionViewCell.identifier
)
collectionView.register(
CategoriesCollectionViewCell.self,
forCellWithReuseIdentifier: CategoriesCollectionViewCell.identifier
)
collectionView.showsVerticalScrollIndicator = false
return collectionView
}()
// MARK: - Life cycle
override func viewDidLoad() {
super.viewDidLoad()
setup()
}
}
// MARK: - Setup views
private extension MenuPageViewController {
func setup() {
setupViews()
setupNavigationBar()
setupViewModel()
}
func setupViews() {
view.backgroundColor = .systemBackground
view.addSubview(collectionView)
collectionView.dataSource = self
collectionView.delegate = self
collectionView.snp.makeConstraints { make in
make.edges.equalTo(view.safeAreaLayoutGuide)
}
}
func setupViewModel() {
menuViewModel = MenuViewModel()
menuViewModel.fetchMenu()
menuViewModel.menuDidChange = { [weak self] in
guard let self = self else { return }
DispatchQueue.main.async {
self.collectionView.reloadData()
}
}
menuViewModel.showError = { [weak self] error in
guard let self = self else { return }
DispatchQueue.main.async {
self.showAlert(title: error.localizedDescription)
}
}
}
}
// MARK: - Setup collection view layout
private extension MenuPageViewController {
func createCategoriesSectionLayout() -> NSCollectionLayoutSection {
let itemSize = NSCollectionLayoutSize(widthDimension: .estimated(100), heightDimension: .absolute(35))
let item = NSCollectionLayoutItem(layoutSize: itemSize)
let groupSize = NSCollectionLayoutSize(widthDimension: .estimated(itemSize.widthDimension.dimension), heightDimension: .absolute(35))
let group = NSCollectionLayoutGroup.horizontal(layoutSize: groupSize, subitems: [item])
let section = NSCollectionLayoutSection(group: group)
section.orthogonalScrollingBehavior = .continuous
section.contentInsets = NSDirectionalEdgeInsets(top: 8, leading: 16, bottom: 0, trailing: 16)
section.interGroupSpacing = 8
return section
}
func createMenuSectionLayout() -> NSCollectionLayoutSection {
let itemSize = NSCollectionLayoutSize(widthDimension: .absolute((view.frame.size.width - 48) / 3), heightDimension: .absolute(view.frame.size.width / 2.55))
let item = NSCollectionLayoutItem(layoutSize: itemSize)
let groupSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1), heightDimension: .absolute(itemSize.heightDimension.dimension))
let group = NSCollectionLayoutGroup.horizontal(layoutSize: groupSize, repeatingSubitem: item, count: 3)
group.interItemSpacing = NSCollectionLayoutSpacing.fixed(8)
let section = NSCollectionLayoutSection(group: group)
section.interGroupSpacing = 14
section.contentInsets = NSDirectionalEdgeInsets(top: 16, leading: 16, bottom: 0, trailing: 16)
return section
}
func layout() -> UICollectionViewLayout {
let layout = UICollectionViewCompositionalLayout(sectionProvider: { sectionIndex, _ in
return sectionIndex == 0 ? self.createCategoriesSectionLayout() : self.createMenuSectionLayout()
})
return layout
}
}
// MARK: - Collection view data source and delegate
extension MenuPageViewController: UICollectionViewDataSource, UICollectionViewDelegate {
func numberOfSections(in collectionView: UICollectionView) -> Int {
2
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
if section == 0 {
return categories.count
} else {
return menuViewModel.menu.count
}
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if indexPath.section == 0 {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: CategoriesCollectionViewCell.identifier, for: indexPath) as! CategoriesCollectionViewCell
let categories = categories[indexPath.item]
cell.configure(categories, isSelected: indexPath.item == categorySelectedIndex)
return cell
} else {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: MenuCollectionViewCell.identifier, for: indexPath) as! MenuCollectionViewCell
let selectedItem = menuViewModel.menu[indexPath.item]
cell.configure(selectedItem)
return cell
}
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
if indexPath.section == 0 {
categorySelectedIndex = indexPath.item
collectionView.reloadData()
} else {
let selectedItem = menuViewModel.menu[indexPath.item]
menuViewModel.showPopUp(selectedItem)
}
}
}
