Ios 在tableview单元格内为collectionview加载更多功能

我想知道如何在tableview单元格内的集合视图中加载更多功能。因为集合视图滚动未启用

在集合视图单元格中放入最后一个索引检查代码会产生奇怪的行为，因为到达最后一个索引的某段时间根本不调用函数，而在移动到其他单元格时，它会加载更多的函数。我知道这是由于tableview单元格造成的。谁能帮我修理一下吗

这是我正在使用的代码：

//
//  JustForYouTableViewCell.swift
//  ShoppingPortal
//
//  Created by Faraz Haider on 10/07/2019.
//  Copyright © 2019 B2b. All rights reserved.
//

import UIKit
protocol JustForYouTableViewCellDelegate: class {
    func justForYouClickedWithItem(_ itemIndex:Int)
    func loadMoreDataForJustForYouWithPageNumber(pageNumber : Int, records: Int)
}


class JustForYouTableViewCell: BaseTableViewCell {

    @IBOutlet weak var justForYouCollectionView: UICollectionView!
    weak var delegate: JustForYouTableViewCellDelegate?
    var justForYouArray = [Product]()
    var cellHeight:CGFloat = 0
    var pageNumber = 1
    var currentRecordsCount = 0
    var totalNumberOfRecord = 0
    var isLoadMore = false
    var isReload = false

    @IBOutlet weak var collectionHeight: NSLayoutConstraint!
    override func awakeFromNib() {
        super.awakeFromNib()
        // Initialization code
    }


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

        // Configure the view for the selected state
    }

    override func updateCell(rowModel: BaseRowModel) {
        if !isReload{
           justForYouArray = rowModel.rowValue as! [Product]
            pageNumber = rowModel.tag
            totalNumberOfRecord = rowModel.rowId
        }

        currentRecordsCount = justForYouArray.count

        if(currentRecordsCount < totalNumberOfRecord){
            isLoadMore = true
        }else{
            isLoadMore = false
        }
        self.delegate = rowModel.delegate as? JustForYouTableViewCellDelegate
        justForYouCollectionView.dataSource = self
        justForYouCollectionView.delegate = self
        justForYouCollectionView.isScrollEnabled = false
        cellHeight = rowModel.rowHeight

        NotificationCenter.default.addObserver(self, selector: #selector(doThisWhenNotify(notification:)), name: NSNotification.Name(rawValue: "post"), object: nil)

        self.collectionHeight.constant = self.justForYouCollectionView.collectionViewLayout.collectionViewContentSize.height;
        justForYouCollectionView.reloadData()
    }

    override func systemLayoutSizeFitting(_ targetSize: CGSize, withHorizontalFittingPriority horizontalFittingPriority: UILayoutPriority, verticalFittingPriority: UILayoutPriority) -> CGSize {

        self.layoutIfNeeded()
        let contentSize = self.justForYouCollectionView.collectionViewLayout.collectionViewContentSize
        return CGSize(width: contentSize.width, height: contentSize.height + 20) // 20 is the margin of the collectinview with top and bottom
    }


    @objc func doThisWhenNotify(notification : NSNotification) {
        if let info = notification.userInfo as? NSDictionary{
            if let id = info["product"] as? [Product]{
                justForYouArray.append(contentsOf:id)
            }
            isReload = true
            let homeVC = self.viewController as? HomeVC
            homeVC?.dashboardTblView.reloadData()

        }
    }

    @IBAction func moreButtonClicked(_ sender: Any) {

        let viewController:MoreProductsVC = UIStoryboard(name: "HomeModule", bundle: nil).instantiateViewController(withIdentifier: "MoreProductsVC") as! MoreProductsVC
        viewController.selectedState = .SelectedStateJustForYou
        self.viewController?.navigationController?.pushViewController(viewController, animated: true)
    }
}
extension JustForYouTableViewCell: UICollectionViewDataSource,UICollectionViewDelegate {

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

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

        let cell : JustForYouCollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: "JustForYouCollectionViewCell", for: indexPath) as! JustForYouCollectionViewCell


        let deals = justForYouArray[indexPath.row]
        cell.titleLabel.text = Utility.checkEmptyString(deals.name)

        if deals.productImage.count>0{
            if let imageUrl = deals.productImage[0].url{
                let url = URL(string: imageUrl)
                let image = UIImage(named: "placeholder")
                cell.dealsImageView.kf.setImage(with: url, placeholder: image)
            }
        }

        if deals.setPriceOption == 1{
            cell.priceLabel.text = String(format: "%@ %d - %d %@", Utility.checkEmptyString(deals.fobPriceName),deals.min,deals.max,Utility.checkEmptyString(deals.tradeUnitName))
        }else{
            if deals.productDifferencePriceQuantity.count>0{
                cell.priceLabel.text = String(format: "%@ %d - %d %@", "USD",deals.productDifferencePriceQuantity[0].mOQ,deals.productDifferencePriceQuantity[0].fOBPrice,Utility.checkEmptyString(deals.tradeUnitTypeName))
            }else{
                cell.priceLabel.text = ""
            }

        }

        // Check if the last row number is the same as the last current data element
        if indexPath.row == self.justForYouArray.count - 1 && self.isLoadMore {
            updateNextSet()
        }

        return cell
    }

    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        print(indexPath.row)
        let deals = justForYouArray[indexPath.row]
        let storyBoard: UIStoryboard = UIStoryboard(name: "HomeModule", bundle: nil)
        let newViewController = storyBoard.instantiateViewController(withIdentifier: "ProductDetailVC") as! ProductDetailVC
        if (deals.productId != nil){
            newViewController.selectedProductId = deals.productId
            self.viewController?.navigationController?.pushViewController(newViewController, animated: true)
        }

    }



    func updateNextSet(){
            pageNumber += 1
            self.delegate?.loadMoreDataForJustForYouWithPageNumber(pageNumber: pageNumber, records: currentRecordsCount)
            isLoadMore = false
    }
}


extension JustForYouTableViewCell: UICollectionViewDelegateFlowLayout {
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        let spacing : CGFloat = (collectionViewLayout as? UICollectionViewFlowLayout)?.minimumInteritemSpacing ?? 0.0
        let widthPerItem = (collectionView.frame.height  - spacing * 2) / 3
        return CGSize(width: screenWidth/2, height: 200)
    }
}

//
//JustForYouTableViewCell.swift
//购物门户
//
//由Faraz Haider于2019年7月10日创建。
//版权所有©2019 B2b。版权所有。
//
导入UIKit
仅适用于YouTableViewCellDelegate的协议：类{
func justForYouClickedWithItem（itemIndex:Int）
func loadMoreDataForJustForYouWithPageNumber（页码：Int，记录：Int）
}
仅为YouTableViewCell类：BaseTableViewCell{
@IBO仅适用于YouCollectionView:UICollectionView！
弱var委托：仅适用于YouTableViewCellDelegate？
var justForYouArray=[Product]（）
变量cellHeight:CGFloat=0
变量pageNumber=1
var currentRecordsCount=0
var totalNumberOfRecord=0
var isLoadMore=false
var isReload=false
@IBOutlet弱var集合高度：NSLayoutConstraint！
重写func awakeFromNib（）{
super.awakeFromNib（）
//初始化代码
}
覆盖功能设置选定（uSelected:Bool，动画：Bool）{
super.setSelected（选定，动画：动画）
//为所选状态配置视图
}
重写func updateCell（行模型：BaseRowModel）{
如果！以色列{
justForYouArray=rowModel.rowValue as！[Product]
pageNumber=rowModel.tag
totalNumberOfRecord=rowModel.rowId
}
currentRecordsCount=justForYouArray.count
if（currentRecordsCountCGSize{
self.layoutifneed（）
让contentSize=self.justForYouCollectionView.collectionViewLayout.collectionViewContentSize
返回CGSize（width:contentSize.width，height:contentSize.height+20）//20是CollectionView的页边距，包括顶部和底部
}
@objc func doThisWhenNotify（通知：NSNotification）{
如果let info=notification.userInfo as？NSDictionary{
如果让id=info[“产品”]作为？[产品]{
justForYouArray.append（contentsOf:id）
}
isReload=true
将homeVC=self.viewController设为？homeVC
homeVC？.dashboardTblView.reloadData（）
}
}
@iAction func moreButtonClicked（\发送方：任意）{
让viewController:MoreProductsVC=UIStoryboard（名称：“HomeModule”，捆绑包：nil）。实例化viewController（标识符为：“MoreProductsVC”）为！MoreProductsVC
viewController.selectedState=.SelectedStateJustForYou
self.viewController？.navigationController？.pushViewController（viewController，动画：true）
}
}
仅适用于YouTableViewCell的扩展名：UICollectionViewDataSource，UICollectionViewDelegate{
func collectionView（collectionView:UICollectionView，numberOfItemsInSection:Int）->Int{
返回justForYouArray.count
}
func collectionView（collectionView:UICollectionView，cellForItemAt indexPath:indexPath）->UICollectionViewCell{
将单元格：JustForYouCollectionViewCell=collectionView.dequeueReusableCell（带有ReuseIdentifier:“JustForYouCollectionViewCell”，for:indexPath）设为！JustForYouCollectionViewCell
let deals=justForYouArray[indexPath.row]
cell.titleLabel.text=Utility.checkEmptyString（deals.name）
如果deals.productImage.count>0{
如果让imageUrl=deals.productImage[0].url{
让url=url（字符串：imageUrl）
让image=UIImage（名为“占位符”）
cell.dealsImageView.kf.setImage（带：url，占位符：image）
}
}
如果deals.setPriceOption==1{
cell.pricellabel.text=String（格式：“%@%d-%d%@”、Utility.checkEmptyString（deals.fobPriceName）、deals.min、deals.max、Utility.checkEmptyString（deals.tradeUnitName））
}否则{
如果deals.productDifferencePriceQuantity.count>0{
cell.priceLabel.text=String（格式：“%@%d-%d%@”，“USD”，deals.productDifferencePriceQuantity[0]。mOQ，deals.productDifferencePriceQuantity[0]。fOBPrice，Utility.checkEmptyString（deals.tradeUnitTypeName））
}否则{
cell.pricellabel.text=“”
}
}
//检查最后一行号是否与最后一个当前数据元素相同
如果indexath.row==self.justForYouArray.count-1&&self.isLoadMore{
updateNextSet（）
}
返回单元
}
func collectionView（collectionView:UICollectionView，didSelectItemAt indexPath:indexPath）{
打印（indexPath.row）
let deals=justForYouArray[indexPath.row]
让故事板：UIStoryboard=UIStoryboard（名称