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Is it possible to disconnect SectionHeade from one UICollectionView?

Forums > Swift

Hi everybody. I decided to make two UICollectionView offices on one screen. SectionHeade registered for the second one. I constantly get an error that the header is not registered. Вопрос такой не могу лия как нибудь игнорировать первый UICollectionView "collectionDevices"? Turn him off header?

Thread 1: "could not dequeue a view of kind: UICollectionElementKindSectionHeader with identifier headerCellForModel - must register a nib or a class for the identifier or connect a prototype cell in a storyboard"
func collectionView(
        _ collectionView: UICollectionView,
        viewForSupplementaryElementOfKind kind: String,
        at indexPath: IndexPath
    ) -> UICollectionReusableView {
        if collectionView == self.collectionModels {

            switch kind {
            case UICollectionView.elementKindSectionHeader:
                let seriesTitle = getSeriesName(section: indexPath.section)
                    let header = UICollectionReusableView()
                if let headerCell = collectionView.dequeueReusableSupplementaryView(
                    ofKind: kind,
                    withReuseIdentifier: collectionViewHeaderFooterReuseIdentifier,
                    for: indexPath
                ) as? SectionHeaderForModelCell {
                    headerCell.labelTitle.text = seriesTitle
                    return headerCell
                }
                return header
            default:
                return UICollectionViewCell()
            }
        }
    }
//
//  MainRepairViewController.swift
//  Apple №1
//
//  Created by Steven Kirke on 16.01.2024.
//

import UIKit

protocol ICustomCellForModelDelegate: AnyObject {
    func viewTapped(text: String)
 }

protocol IMainRepairViewLogic: AnyObject {
    /// Отображение получаемых из вне данных.
    /// - Parameters:
    ///     - contactList: Модель контактов, для отображения во View.
    func render(viewModel: [MainRepairModel.ViewModel.Device])
}

final class MainRepairViewController: UIViewController {

    // MARK: - Dependencies
    var iterator: IMainRepairIterator?

    // MARK: - Private properties
    private let customUI = CustomUI()
    private var headerForCellModel = SectionHeaderForModelCell()
    private let collectionViewHeaderFooterReuseIdentifier = "headerCellForModel"
    private lazy var collectionDevices = customUI.createCollectionView(direction: .horizontal)
    private lazy var collectionModels = customUI.createCollectionView(direction: .vertical)
    private var modelForDisplayDevices: [Device] = []
    private var modelForDisplaySeries: [Series] = []
    private var currentDevice: Int = 0

    // MARK: - Initializator
    init() {
        super.init(nibName: nil, bundle: nil)
    }

    required init?(coder: NSCoder) {
        super.init(coder: coder)
    }

    // MARK: - Public methods
    override func viewDidLoad() {
        super.viewDidLoad()
        setupConfiguration()
        addUIView()
        iterator?.fetchCatalog()
    }

    override func viewDidLayoutSubviews() {
        super.viewDidLayoutSubviews()
        setupLayout()
    }
}

// - MARK: Handler for models
private extension MainRepairViewController {
    /**
     Получение количества девайсов.
     - Returns: Количество девайсов.
     */
    func getDevicesCount() -> Int {
        !modelForDisplayDevices.isEmpty ? modelForDisplayDevices.count : 0
    }

    /**
     Получение количество серий для текущего девайся.
     - Parameters:
            - index: Int Число, индекс текущего элемента массива.
     - Returns: Количество серий.
     */
    func getSeriesCount(indexDevice: Int) -> Int {
        if getDevicesCount() > 0 {
            if indexDevice < modelForDisplayDevices[indexDevice].series.count {
                return modelForDisplayDevices[indexDevice].series.count
            }
        }
        return 0
    }

    /**
     Название серии..
     - Parameters:
            - section: Int Текущая секция.
     - Returns: Название серии устройств.
     */
    func getSeriesName(section: Int) -> String {
        if getSeriesCount(indexDevice: currentDevice) > 0 {
            if section < modelForDisplayDevices[currentDevice].series.count {
                return modelForDisplayDevices[currentDevice].series[section].titleSeries
            }
        }
        return "Empty"
    }

    func getModelsCount(section: Int) -> Int {
        if getDevicesCount() > 0 && getSeriesCount(indexDevice: currentDevice) > 0 {
            if modelForDisplayDevices[currentDevice].series[section].models.count > 0 {
                let count = modelForDisplayDevices[currentDevice].series[section].models.count
                return count
            }
        }
        return 0
    }

    func getModelsTitle(section: Int, indexPath: Int) -> String {
        if getDevicesCount() > 0 && getSeriesCount(indexDevice: currentDevice) > 0 {
            if modelForDisplayDevices[currentDevice].series[section].models.count > 0 {
                if indexPath < modelForDisplayDevices[currentDevice].series[section].models.count {
                    let title = modelForDisplayDevices[currentDevice].series[section].models[indexPath].title
                    return title
                }
            }
        }
        return "Empty"
    }
}

// - MARK: Add UIView in Controler
private extension MainRepairViewController {
    /// Добавление элементов UIView в Controller.
    func addUIView() {
        let views: [UIView] = [collectionDevices, collectionModels]
        views.forEach(view.addSubview)
    }
}

// - MARK: Initialisation configuration
private extension MainRepairViewController {
    /// Настройка UI элементов
    func setupConfiguration() {
        view.backgroundColor = Theme.backgroundColor
        collectionDevices.backgroundColor = Theme.backgroundColor
        collectionDevices.showsHorizontalScrollIndicator = false
        collectionDevices.register(CustomCellForDevice.self, forCellWithReuseIdentifier: "cell")
        collectionDevices.delegate = self
        collectionDevices.dataSource = self

        collectionModels.backgroundColor = Theme.backgroundColor
        collectionModels.register(
            SectionHeaderForModelCell.self,
            forSupplementaryViewOfKind: UICollectionView.elementKindSectionHeader,
            withReuseIdentifier: collectionViewHeaderFooterReuseIdentifier
        )
        collectionModels.register(CustomCellForModel.self, forCellWithReuseIdentifier: "cell")

        collectionModels.showsVerticalScrollIndicator = false

        collectionModels.delegate = self
        collectionModels.dataSource = self
    }
}

// - MARK: Initialisation constraint elements.
private extension MainRepairViewController {
    /// Верстка элементов UI.
    /// - Note: Добавление constraints для UIView элементов.
    func setupLayout() {
        NSLayoutConstraint.activate([
            collectionDevices.topAnchor.constraint(equalTo: view.topAnchor, constant: 50),
            collectionDevices.leadingAnchor.constraint(equalTo: view.leadingAnchor),
            collectionDevices.trailingAnchor.constraint(equalTo: view.trailingAnchor),
            collectionDevices.heightAnchor.constraint(equalToConstant: 100),

            collectionModels.topAnchor.constraint(equalTo: collectionDevices.bottomAnchor, constant: 0),
            collectionModels.leadingAnchor.constraint(equalTo: view.leadingAnchor),
            collectionModels.trailingAnchor.constraint(equalTo: view.trailingAnchor),
            collectionModels.bottomAnchor.constraint(equalTo: view.bottomAnchor)
        ])
    }
}

extension MainRepairViewController:
    UICollectionViewDelegateFlowLayout,
    UICollectionViewDataSource,
    UICollectionViewDelegate {

    /// Количество секции в текущем UICollectionView.
    func numberOfSections(in collectionView: UICollectionView) -> Int {
        switch collectionView {
        case self.collectionDevices:
            return getDevicesCount()
        case self.collectionModels:
            return getSeriesCount(indexDevice: currentDevice)
        default:
            return 0
        }
    }

    func collectionView(
        _ collectionView: UICollectionView,
        layout collectionViewLayout: UICollectionViewLayout,
        sizeForItemAt indexPath: IndexPath
    ) -> CGSize {
        switch collectionView {
        case self.collectionDevices:
            return CGSize(width: 120, height: 40)
        case self.collectionModels:
            return CGSize(width: collectionView.frame.size.width, height: 40)
        default:
            return CGSize(width: 0, height: 0)
        }
    }

    func collectionView(
        _ collectionView: UICollectionView,
        layout collectionViewLayout: UICollectionViewLayout,
        referenceSizeForHeaderInSection section: Int
    ) -> CGSize {
        switch collectionView {
        case self.collectionDevices:
            return CGSize(width: 10, height: 0)
        case self.collectionModels:
            return CGSize(width: collectionView.frame.size.width, height: 40)
        default:
            return CGSize(width: 0, height: 0)
        }
    }

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        switch collectionView {
        case self.collectionDevices:
            return 1
        case self.collectionModels:
            return getModelsCount(section: section)
        default:
            return 0
        }
    }

    func collectionView(
        _ collectionView: UICollectionView,
        viewForSupplementaryElementOfKind kind: String,
        at indexPath: IndexPath
    ) -> UICollectionReusableView {
        if collectionView == self.collectionModels {

            switch kind {
            case UICollectionView.elementKindSectionHeader:
                let seriesTitle = getSeriesName(section: indexPath.section)
                    let header = UICollectionReusableView()
                if let headerCell = collectionView.dequeueReusableSupplementaryView(
                    ofKind: kind,
                    withReuseIdentifier: collectionViewHeaderFooterReuseIdentifier,
                    for: indexPath
                ) as? SectionHeaderForModelCell {
                    headerCell.labelTitle.text = seriesTitle
                    return headerCell
                }
                return header
            default:
                return UICollectionViewCell()
            }
        }
    }

    func collectionView(
        _ collectionView: UICollectionView,
        cellForItemAt indexPath: IndexPath
    ) -> UICollectionViewCell {
        var cell: UICollectionViewCell = UICollectionViewCell()
        switch collectionView {
        case self.collectionDevices:
            let titleDevice = modelForDisplayDevices[indexPath.section].title
            cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)
            if let customCell = cell as? CustomCellForDevice {
                customCell.labelTitle.text = titleDevice
                return customCell
            }
        case self.collectionModels:
            let cellTitle = getModelsTitle(section: indexPath.section, indexPath: indexPath.row)
            cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)
            if let customCell = cell as? CustomCellForModel {
                let tapGesture = UITapGestureRecognizer(target: self, action: #selector(printHello))
                customCell.addGestureRecognizer(tapGesture)
                customCell.labelTitle.text = cellTitle
                return customCell
            }
        default:
            return cell
        }
        return cell
    }

    func collectionView(
        _ collectionView: UICollectionView,
        layout collectionViewLayout: UICollectionViewLayout,
        minimumLineSpacingForSectionAt section: Int
    ) -> CGFloat {
        return 0
    }

    @objc func printHello() {
        print("1")
    }
}

// MARK: - Render
extension MainRepairViewController: IMainRepairViewLogic {
    func render(viewModel: [MainRepairModel.ViewModel.Device]) {
        self.modelForDisplayDevices = viewModel
        collectionDevices.reloadData()
        collectionModels.reloadData()
        // showModel()
    }

    func showModel() {
        for device in modelForDisplayDevices {
            print("\(device.title)")
            if !device.series.isEmpty {
                for series in device.series {
                    print("\(series.titleSeries)")
                }
            }
        }
    }
}

// MARK: Load data.
private extension MainRepairViewController {
    @objc func fetchCatalog() {
        // iterator?.fetchCatalog()
    }
}

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