SWIFT: Communicating data from ViewController where tableView is defined to tableViewCell

Question

I have programmatically implemented a tableView inside a viewController:

class MoviesViewController5: UIViewController {
    let tableView = UITableView()
    
    
    // There's a code responsible for populating this array
    var moviesItemsArray = [[movieItem]]()
    var sectionsData:[[String:Any]]?

    let cellIdentifier = "movieCardCell"
    
    override func viewDidLoad() {
        super.viewDidLoad()
        tableView.delegate = self
        tableView.dataSource = self
         tableView.register(sectionTableCell2.self, forCellReuseIdentifier: "tableViewCell")
        displayTableView2()
    }

    func displayTableView2() {
        self.view.addSubview(tableView)
        tableView.translatesAutoresizingMaskIntoConstraints = false

        tableView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
        tableView.leftAnchor.constraint(equalTo: view.leftAnchor).isActive = true
        tableView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
        tableView.rightAnchor.constraint(equalTo: view.rightAnchor).isActive = true
    }
}

extension MoviesViewController5: UITableViewDelegate, UITableViewDataSource {
     func tableView(_ tableView: UITableView, canFocusRowAt indexPath: IndexPath) -> Bool {
      return false
    }
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 20
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        guard let cell =
            tableView.dequeueReusableCell(withIdentifier: "tableViewCell", for: indexPath) as? sectionTableCell2
          else {
                fatalError("Unable to create explore table view cell")}
        return cell
    }
    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        return 140
    }
}

The tableViewCell is also implemented programmatically:

class TableViewCell3: UITableViewCell {
    var moviesItems: [movieItem] = []
    let cellIdentifier = "movieCardCell"
    var collectionViewTest:UICollectionView = UICollectionView(frame: CGRect.zero, collectionViewLayout: UICollectionViewFlowLayout())
    fileprivate let cellOffset: CGFloat = 50
    
    func setupCollectionView() {
        collectionViewTest.delegate = self
        // TODO: Should I communicate moviesItems to TableViewCell3 or set the dataSource to MoviesViewController 5
        collectionViewTest.dataSource = self
    }
}

// Trying to display only one collectionView in tableCell
extension TableViewCell3: UICollectionViewDelegate, UICollectionViewDataSource {
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return moviesItems.count
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier:
            cellIdentifier, for: indexPath) as! movieCardCell
        cell.movieImageView.sd_setImage(with: URL(string: moviesItems[indexPath.item].imageURL))
        return cell
    }
}

WHAT I WANT TO IMPLEMENT:

Populate moviesItemsArray inside MoviesViewController5
Communicate each moviesItems of moviesItemsArray to each correspondant TableViewCell3 based on the index
Affect the received movie data to the class property moviesItems of TableViewCell3
Display the movies data inside the TableViewCell3 with the help of collectionViewTest

PROBLEM (STEP 2): I don't know how to communicate each moviesItems of moviesItemsArray to each correspondant TableViewCell3 based on the index.
NOTE: The other steps have already been taken care of.

QUESTION: Should I communicate the data like any communication between different classes in SWIFT OR there's something that needs to be done with collectionViewTest.dataSource inside the TableViewCell3

Please ask only **one** question at a time. Start simple... If you work through your problem so you can ask only the first question, you may find the answer yourself. At the least, you'll be able to post a single question that makes sense on its own. — DonMag, Oct 05 '20 at 14:50
The question is how can I communicate the information to tableViewCell. I just wanted to provide two approaches that I thought about (which was unnecessary, I could've just asked ONE question: How do I do this) — AG_HIHI, Oct 05 '20 at 14:54

score 1 · Answer 1 · answered Oct 05 '20 at 15:08

The question is how can I communicate the information to tableViewCell

That is what cellForRowAt is for. Your implementation is currently effectively empty:

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    guard let cell = tableView.dequeueReusableCell(withIdentifier: "tableViewCell", for: indexPath) as? sectionTableCell2
    else {
        fatalError("Unable to create explore table view cell")
    }
    // HERE, THIS IS WHERE YOU DO IT
    return cell
}

score 0 · Answer 2 · answered Oct 05 '20 at 15:14

0

Just found an answer in a similar project:

  func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    if let _cell = tableView.dequeueReusableCell(withIdentifier: tableCellIdentifier, for: indexPath) as? CatalogueTableViewCell {
      // THIS
      _cell.images = images[indexPath.section]
      return _cell
    } else {
      return UITableViewCell()
    }
  }

Images is the property that's used for communicating:

class CatalogueTableViewCell: UITableViewCell {

  internal var images: [UIImage]! 
    }

answered Oct 05 '20 at 15:14

AG_HIHI

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Same as my answer. – matt Oct 05 '20 at 15:28
@matt You did not provide details – AG_HIHI Oct 05 '20 at 15:47

SWIFT: Communicating data from ViewController where tableView is defined to tableViewCell

2 Answers2