ios - 将数据从 UITableView 传递到 UICollectionView

Question

我想获得 JSON 响应并在我的 View Controller 中显示数据。

我有这个 JSON 响应:

{"status":1,"data":{"blocks":[{"name":"CustomBlock","description":"CustomDescription","items":[1]}], "items":[{"id:"1", name: "testgame"}]}

我有带有名称、描述和项目数组的 block 。此外，所有项目都通过关键“项目”传递到这里

我已经创建了这个 TableView 类

BlocksTableView.swift

class BlocksTableView : UITableView, UITableViewDataSource, 
UITableViewDelegate
{
    var blocks = [Block]()
    var items : BlockItem!

    override func awakeFromNib() {
        self.delegate = self
        self.dataSource = self
        self.loadBlocks()
    }
    func loadBlocks()
    {
        guard let url = URL(string : "myURL") else { return }
        URLSession.shared.dataTask(with: url) { (data, response, err) in
            guard let data = data else { return }
            do {
                let response = try JSONDecoder().decode(APIResponse.self, from: data)
                self.blocks = response.data.blocks;
                self.items = response.data.items;

                DispatchQueue.main.async {
                    self.reloadData()
                }
            } catch let jsonErr {
                print(jsonErr)
            }
            }.resume()
    }
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return blocks.count
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        guard let cell = tableView.dequeueReusableCell(withIdentifier: "BlockCell") as? BlockCell else { return UITableViewCell() }
        cell.blockName.text = blocks[indexPath.row].name
        cell.blockDescription.text = blocks[indexPath.row].description
        cell.gameCollectionView.reloadData()
        return cell
    }
}

现在我想在 tableviewcell 中的 collectionview 中显示项目，但我不知道该怎么做。由于每个 block 都有不同的项目数，我需要将 block 和项目变量传递给我的 CollectionViewClass，对吧？但是如何正确地做到这一点呢？

这是我的 Collection View 类

class GameCollectionView : UICollectionView, 
UICollectionViewDataSource, UICollectionViewDelegate
{
    override func awakeFromNib() {
        self.delegate = self
        self.dataSource = self
    }
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        //here i need to return number of items in current block, something like blocks[0].items.count
        return 0
    }
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

        guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "GameCollectionCell", for: indexPath) as? GameCollectionCell else { return
            UICollectionViewCell()
    }
    return cell
}

Answer 1

你可以试试

class BlocksTableView : UITableView, UITableViewDataSource,UITableViewDelegate,UICollectionViewDataSource, UICollectionViewDelegate {

    var blocks = [Block]()
    var items : BlockItem!

    override func awakeFromNib() {
        self.delegate = self
        self.dataSource = self
        self.loadBlocks()
    }
    func loadBlocks()
    {
        guard let url = URL(string : "myURL") else { return }
        URLSession.shared.dataTask(with: url) { (data, response, err) in
            guard let data = data else { return }
            do {
                let response = try JSONDecoder().decode(APIResponse.self, from: data)
                self.blocks = response.data.blocks;
                self.items = response.data.items;

                DispatchQueue.main.async {
                    self.reloadData()
                }
            } catch let jsonErr {
                print(jsonErr)
            }
            }.resume()
    }
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return blocks.count
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        guard let cell = tableView.dequeueReusableCell(withIdentifier: "BlockCell") as? BlockCell else { return UITableViewCell() }
        cell.blockName.text = blocks[indexPath.row].name
        cell.blockDescription.text = blocks[indexPath.row].description
        cell.gameCollectionView.delegate = self
        cell.gameCollectionView.dataSource = self
        cell.gameCollectionView.tag = indexPath.row
        cell.gameCollectionView.reloadData()
        return cell
    }
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {

        return  blocks[collectionView.tag].items.count
    }
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

        guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "GameCollectionCell", for: indexPath) as? GameCollectionCell else { return
            UICollectionViewCell() } 

      // here use  blocks[collectionView.tag].items[indexPath.row] for each item
        return cell
    }
}