swift - TableView 内部的 CollectionView

Question

我在 TableViewController 单元格中有一个 CollectionView tableView 包含 3 个部分，每个部分都是一个不同的类别。我如何在每个部分传递不同的数据。喜欢 Netflix 应用

在 UICollectionViewController 文件中

import UIKit
import Alamofire

class HomeViewController: UITableViewController, MovieDataDelegate {

    let tableViewHeaderIdentifier = "FeaturedTableHeader"
    var homePresenter : HomePresenter!


    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.

        let headerNib = UINib(nibName: "FeaturedUITableViewHeaderView", bundle: nil)
        tableView.register(headerNib, forHeaderFooterViewReuseIdentifier: tableViewHeaderIdentifier)

        homePresenter = HomePresenter()
        homePresenter.delegate = self
        homePresenter.fetchData()
        homePresenter.fetchImageData()

    }


    func arrayOfMoviesNames(names: [String]) {
        //print(homePresenter.homeData.moviesNamesArray)
        tableView.reloadData()
    }

    func arrayOfPosters(path: [String]) {
        //print(homePresenter.homeData.posterPathsArray)
    }



    //MARK: - Home UI table
    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 1
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell =  tableView.dequeueReusableCell(withIdentifier: "featuredCell", for: indexPath) as! FeaturedTableViewCell

        cell.homeCollectionView.dataSource = self
        return cell
    }

    override func numberOfSections(in tableView: UITableView) -> Int {
        return 3
    }

    override func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
        let headerView = tableView.dequeueReusableHeaderFooterView(withIdentifier: tableViewHeaderIdentifier) as! FeaturedUITableViewHeaderView

        switch section {
        case 0:
            headerView.isHidden = true
        case 1:
            headerView.catagoryLabel.text = "Popular Movies"
        case 2:
            headerView.catagoryLabel.text = "Celebs"
        default:
            headerView.catagoryLabel.text = "" as String
        }

        return headerView
    }

    override func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {

        if section == 0 {
            return 0
        }
        return 35
    }

    override func tableView(_ tableView: UITableView, estimatedHeightForFooterInSection section: Int) -> CGFloat {
        return 12
    }

    override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {

        guard let tableViewCell = cell as? FeaturedTableViewCell else { return }

        tableViewCell.setCollectionViewDataSourceDelegate(self, forRow: indexPath.row)

    }


}




//MARK: - collectionView
extension HomeViewController : UICollectionViewDataSource, UICollectionViewDelegate {

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return homePresenter.homeData.moviesNamesArray.count
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "homeCollectionCell", for: indexPath) as! HomeCollectionViewCell
        cell.posterImage.image = UIImage(named: "Aladdin")

        cell.movieName.text = "coco"

        return cell
    }


}

在 UITableViewCell 文件中

import UIKit

class FeaturedTableViewCell: UITableViewCell {

    @IBOutlet weak var homeCollectionView: UICollectionView!


    override func awakeFromNib() {
        super.awakeFromNib()
        // Initialization code
        let collectionNib = UINib(nibName: "HomeCollectionViewCell", bundle: nil)
        homeCollectionView.register(collectionNib, forCellWithReuseIdentifier: "homeCollectionCell")
    }

    override func setSelected(_ selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)

        // Configure the view for the selected state
    }

}
extension FeaturedTableViewCell {

     func setCollectionViewDataSourceDelegate<D: UICollectionViewDataSource & UICollectionViewDelegate>(_ dataSourceDelegate: D, forRow row: Int) {

          homeCollectionView.delegate = dataSourceDelegate
          homeCollectionView.dataSource = dataSourceDelegate
          homeCollectionView.tag = row
          homeCollectionView.reloadData()
}

}

screenshot of app

我想为 tabelview 的每个部分显示不同的图像和文本

Answer 1

创建一个结构体 Movie 并在 View Controller 中创建一个元组数组。在元组中添加一个类别标题和一组相关电影。在 TableView 数据源方法中使用主数组，在 Collection View 数据源方法中使用相应元组中的电影数组。将当前元组/节索引设置为 collectionView 标记。并在 Collection View 数据源方法中获取适当的电影数组。

//主视图 Controller

class HomeViewController: UITableViewController {
    struct Movie {
        var name: String
        var image: UIImage?
        //other details
    }
    var movieDetails:[(title:String, movies:[Movie])] = []
    override func viewDidLoad() {
        super.viewDidLoad()
        tableView.register(FeaturedCell.self, forCellReuseIdentifier: "FeaturedCell")
        movieDetails = [(title: "MoviesDB", movies: [Movie(name: "a", image: UIImage(named: "a")),
                                                     Movie(name: "b", image: UIImage(named: "b")),
                                                     Movie(name: "c", image: UIImage(named: "c"))]),
                        (title: "Popular Movies", movies: [Movie(name: "d", image: UIImage(named: "d")),
                                                           Movie(name: "e", image: UIImage(named: "e")),
                                                           Movie(name: "f", image: UIImage(named: "f"))]),
                        (title: "Celebs", movies: [Movie(name: "g", image: UIImage(named: "g")),
                                                   Movie(name: "h", image: UIImage(named: "h")),
                                                   Movie(name: "i", image: UIImage(named: "i"))])]
    }
    // MARK: - Table view data source
    override func numberOfSections(in tableView: UITableView) -> Int {
        return movieDetails.count
    }
    override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
        return movieDetails[section].title
    }
    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 1
    }
    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "FeaturedCell") as? FeaturedCell ?? FeaturedCell(style: .default, reuseIdentifier: "FeaturedCell")
        cell.collectionView.tag = indexPath.section
        cell.collectionView.delegate = self
        cell.collectionView.dataSource = self
        return cell
    }
}
extension HomeViewController: UICollectionViewDataSource, UICollectionViewDelegate {
    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 1
    }
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return movieDetails[collectionView.tag].movies.count
    }
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "HomeCell", for: indexPath) as? HomeCell ?? HomeCell()
        let movie = movieDetails[collectionView.tag].movies[indexPath.item]
        cell.posterImage.image = movie.image
        cell.movieName.text = movie.name
        return cell
    }
}

//特色单元格

class FeaturedCell: UITableViewCell {

    var collectionView = UICollectionView(frame: .zero, collectionViewLayout: UICollectionViewFlowLayout())

    override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        commonInit()
    }
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        commonInit()
    }
    func commonInit() {

        if let layout = collectionView.collectionViewLayout as? UICollectionViewFlowLayout {
            layout.scrollDirection = .horizontal
        }
        collectionView.register(HomeCell.self, forCellWithReuseIdentifier: "HomeCell")
        collectionView.translatesAutoresizingMaskIntoConstraints = false
        addSubview(collectionView)

        collectionView.topAnchor.constraint(equalTo: topAnchor).isActive = true
        collectionView.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = true
        collectionView.leadingAnchor.constraint(equalTo: leadingAnchor).isActive = true
        collectionView.trailingAnchor.constraint(equalTo: trailingAnchor).isActive = true
    }
}

//主单元格

class HomeCell: UICollectionViewCell {
    let posterImage = UIImageView()
    let movieName = UILabel()
    //...
}