swift - UITableviewCell 中的 TableView 不显示单元格

Question

我在 UITableviewCell 中有一个 UITablaView。这是我的代码:

UITableViewCell:

class ProductViewCell: UITableViewCell {

@IBOutlet weak var totalOrderButton: UIButton!
@IBOutlet weak var productImage: UIImageView!
@IBOutlet weak var productNameLabel: UILabel!
@IBOutlet weak var productSubNameLabel: UILabel!
@IBOutlet weak var productBioLabel: UILabel!
@IBOutlet weak var mlButton: UIButton!
@IBOutlet weak var productQuantity: UILabel!
@IBOutlet weak var plusButton: UIButton!
@IBOutlet weak var minusButton: UIButton!
@IBOutlet weak var greenHeartButton: UIButton!
@IBOutlet weak var liquorsTableView: UITableView!

var fourLiquorStores: [LiquorStore] = []

var currentUser: User!

var currentProduct: Product! {
    didSet {
        updateUI()
    }
}

func updateUI() {
    downloadProductImage()
    productNameLabel.text = currentProduct.name
    productSubNameLabel.text = currentProduct.subName
    productBioLabel.text = currentProduct.description
    productQuantity.text = "\(currentProduct.quantity)"
    updateGreenHeart()

}
var cache = SAMCache.shared()
weak var delegate: ProductViewCellDelegate!

override func awakeFromNib() {
    super.awakeFromNib()
    liquorsTableView.estimatedRowHeight = 65
    liquorsTableView.rowHeight =  65
    liquorsTableView.delegate = self
    liquorsTableView.dataSource = self
    fetchLiquorStores()
}

func fetchLiquorStores() {
      LiquorStore.observeNewLiquorStore { (liquorStore) in
        LiquorStore.observeNewLiquorStore { (liquorStore) in
            if !self.fourLiquorStores.contains(liquorStore) {
                self.fourLiquorStores.append(liquorStore)
                self.delegate.updateTableView()
                print(self.fourLiquorStores)
            }
        }
    }
}




func downloadProductImage() {
    let productuid = currentProduct.uid
    let profileImageKey = "\(productuid)"

    if let image = cache?.object(forKey: profileImageKey) as? UIImage {
        productImage.image = image
    } else {
    currentProduct.downloadPopularProductImage { [weak self] (image, error) in
        if let error = error {
            print(error.localizedDescription)
        } else {
            self?.productImage.image = image
            self?.cache?.setObject(image, forKey: profileImageKey)
        }
    }
    }
}


// Ad o delete Quantities
@IBAction func plusDidTap() {
    if currentProduct.quantity >= 1 && currentProduct.quantity <= 60 {
        currentProduct.quantity += 1
        delegate.updateTableView()

    }
}

@IBAction func minusDidTap() {
    if currentProduct.quantity > 1 {
        currentProduct.quantity -= 1
        delegate.updateTableView()
    }
}


func updateGreenHeart() {
    if let currentUser = currentUser {
        if currentUser.favoriteProducts.contains(currentProduct) {
            greenHeartButton.setImage(#imageLiteral(resourceName: "GreenHeartFilled"), for: [])
        } else {
            greenHeartButton.setImage(#imageLiteral(resourceName: "GreenHeart"), for: [])
        }
    }
}

// Ad or delete Favorite Products
@IBAction func greenHeartDidTap() {
    if currentUser.favoriteProducts.contains(currentProduct) {
        self.greenHeartButton.setImage(#imageLiteral(resourceName: "GreenHeart"), for: [])
        self.currentUser.deleteFavoriteProduct(product: currentProduct)
    } else {
        self.greenHeartButton.setImage(#imageLiteral(resourceName: "GreenHeartFilled"), for: [])
        self.currentUser.addFavoriteProduct(product: currentProduct)

    }
}

extension ProductViewCell: UITableViewDataSource, UITableViewDelegate {


func numberOfSections(in tableView: UITableView) -> Int {
    return fourLiquorStores.count
}

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return 1
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = liquorsTableView.dequeueReusableCell(withIdentifier: "LiquorStoreViewCell", for: indexPath) as! LiquorStoresViewCell
    cell.currentProduct = self.currentProduct
    cell.liquorStore = self.fourLiquorStores[indexPath.section]

    return cell
}

UITablViewCell -2 :

class LiquorStoresViewCell: UITableViewCell {

@IBOutlet weak var liquorStoreNameLabel: UILabel!
@IBOutlet weak var liquorStorePriceLabel: UILabel!
@IBOutlet weak var liquorStoreTimeLabel: UILabel!
@IBOutlet weak var starStackView: UIStackView!
@IBOutlet weak var imageViewBoard: UIImageView!

var currentProduct: Product!
var currentPriceIndex: Int = 0

var liquorStore: LiquorStore! {
    didSet {
        updateUI()
    }
}



func updateUI() {
changeLiquorStoreProductsUid()
liquorStoreNameLabel.text = liquorStore.userName
let index = liquorStore.products.index(of: currentProduct)
    if let index = index {
        let productPrice = liquorStore.products[index].price[currentPriceIndex]
       format(price: productPrice)
    }
}



// Format Product Price to Currency
func format(price: Double)  {
    let formatter = NumberFormatter()
    formatter.locale = Locale.current // Change this to another locale if you want to force a specific locale, otherwise this is redundant as the current locale is the default already
    formatter.numberStyle = .currency
    if let formattedTipAmount = formatter.string(from: price as NSNumber) {
        liquorStorePriceLabel.text = "Tip Amount: \(formattedTipAmount)"
    }
}

// Func to organize LiquorStores
func changeLiquorStoreProductsUid () {
    for product in liquorStore.products {
        if self.currentProduct.name == product.name && self.currentProduct.description == product.description && self.currentProduct.subName == product.subName {
            let index = liquorStore.products.index(of: product)
            if let index = index {
                liquorStore.products[index].uid = currentProduct.uid
            }
        }
    }
}



override func setSelected(_ selected: Bool, animated: Bool) {
    super.setSelected(selected, animated: animated)
    liquorStorePriceLabel.textColor = UIColor.white
    liquorStoreNameLabel.textColor = UIColor.white
    liquorStoreTimeLabel.textColor = UIColor.white
    imageViewBoard.backgroundColor = #colorLiteral(red: 0.5239839702, green: 0.5239839702, blue: 0.5239839702, alpha: 1)
    for view in starStackView.subviews {
        let image = view as! UIImageView
        image.image = #imageLiteral(resourceName: "WhiteStar")
    }

}

UITableviewCell 中的 UITableView 不显示数据:/有什么问题？

这就是我正在构建的: StoryBoard

这出现在模拟器中，如您所见，第二个 TableView 是空的:

Simulator

PD:我正在从 firebase 成功下载 liquorStores。

Answer 1

虽然可能做您想做的事，但完全重新考虑您的架构会多简单。如果您的 View Controller 只显示一个产品，外加一个酒类商店列表，那么产品 View 根本不应该放在一个单元格中——只需将它设为一个普通 View ，并将该 View 设为您的表的标题即可。这些单元格将成为酒类商店，您不再需要处理在单元格中嵌套表格的问题。或者，您可以将产品 View 保留在一个单元格中，但只需将酒类商店的原型(prototype)作为第二种单元格添加到同一个表格中。

编辑:既然您已经发布了 Storyboard屏幕截图，那么最简单的事情就是将您的酒类商店原型(prototype)单元格移至顶级表格，从顶级单元格中删除子表格，然后在你的数据源，有

func tableView(_ tableView: UITableView, cellForRowAtIndexPath path: NSIndexPath) -> UITableViewCell {
    if path.row == 0 {
        return tableView.dequeueCellWithIdentifier("productDetailsCell")!
    } else {
        return tableView.dequeueCellWithIdentifier("liquorStoreCell")!
    }
}