ios - 如何防止在 cellForRowAt 中重复相同的代码

Question

你能帮我找到一个解决方案，而不是一次又一次地复制相同的代码吗？现在我有了这段代码

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    if indexPath.row == 0 {
        let cell = tableView.dequeueReusableCell(withIdentifier: productImageCell, for: indexPath) as! ProductImageCell
        if let product = self.product {
            cell.product = product
        }
        cell.selectionStyle = .none
        return cell
    } else if indexPath.row == 1 {
        let cell = tableView.dequeueReusableCell(withIdentifier: productDetailCell, for: indexPath) as! ProductDetailCell
        cell.backgroundColor = UIColor.lightGray
        if let product = self.product {
            cell.product = product
        }
        cell.selectionStyle = .none
        return cell
    } else if indexPath.row == 2 {
        let cell = tableView.dequeueReusableCell(withIdentifier: productDeliveryCell, for: indexPath) as! ProductDeliveryTimeCell
        cell.selectionStyle = .none
        return cell
    } else {
        let cell = tableView.dequeueReusableCell(withIdentifier: productDeliveryCell, for: indexPath) as! ProductDeliveryTimeCell
        cell.selectionStyle = .none
        return cell
    }
}

如你所见，我确实一次又一次地复制这部分

    let cell = tableView.dequeueReusableCell(withIdentifier: productImageCell, for: indexPath) as! ProductImageCell
    if let product = self.product {
        cell.product = product
    }
    cell.selectionStyle = .none
    return cell

我确实尝试过类似的方法，但它不起作用

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    var cell = UITableViewCell()

    if indexPath.row == 0 {
        cell = tableView.dequeueReusableCell(withIdentifier: productImageCell, for: indexPath) as! ProductImageCell
    } else if indexPath.row == 1 {
        cell = tableView.dequeueReusableCell(withIdentifier: productDetailCell, for: indexPath) as! ProductDetailCell
    } else if indexPath.row == 2 {
        cell = tableView.dequeueReusableCell(withIdentifier: productDeliveryCell, for: indexPath) as! ProductDeliveryTimeCell
    } else {
        cell = tableView.dequeueReusableCell(withIdentifier: productDeliveryCell, for: indexPath) as! ProductDeliveryTimeCell
    }

    if let product = self.product {
        cell.product = product
    }
    cell.selectionStyle = .none
    return cell
}

Answer 1

在所有单元格中包含 product 属性。删除 indexpath.row == 2 block ，它什么都不做。

这样写代码，

if indexPath.row == 1 {
    var cell = tableView.dequeueReusableCell(withIdentifier: productImageCell, for: indexPath) as! ProductImageCell
    cell.product == "" //clear product field for reusing property 
     if let product = self.product {
        cell.product = product
    }
    cell.selectionStyle = .none
    return cell
} else if .....