收集单元格在每次调用 reloadData() 时删除项目 Swift 5

Question

请看下图，这是我正确的初步看法。

但是在为 collectionView 调用 reloadData() 之后，它会删除 "COMPLETED" 状态标签，如果我再次重复该操作，它将删除 "PROCESSING" 状态标签。有谁知道为什么会这样？

这是我的 cellForItemAt 代码。

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: DFCollectionViewCellIdentifierConstants.DF_CAPTURED_PANORAMAS_CELL, for: indexPath) as! DFCapturedPanoramasCollectionViewCell
        cell.capturedPanoramasImages.layer.masksToBounds = true
        cell.capturedPanoramasImages.layer.borderWidth = 1
        cell.capturedPanoramasImages.layer.borderColor = UIColor().hexColor(DFColorConstants.INPUT_TEXT_COLOR).cgColor
        cell.capturedPanoramasImages.layer.cornerRadius = 4

        let url = URL(string:panoramaList[indexPath.item].panoramaThumbnailPath)
        if url != nil && self.panoramaList[indexPath.item].panoramaStatus == DFPanoramaStatusConstants.DF_COMPLETED {
            self.panoramaStatusLabelFunc(cell: cell, index: indexPath.item, bgColor: UIColor().hexColor(DFColorConstants.PANORAMA_STATUS_COMPLETED_COLOR))
            cell.capturedPanoramasImages.contentMode = .scaleAspectFill
            if let data = try? Data(contentsOf: url!)
            {
                let image = UIImage(data: data)
                cell.capturedPanoramasImages.image = image
            }
            cell.capturedPanoramasLabel.text = panoramaList[indexPath.item].name
        } else if url == nil && self.panoramaList[indexPath.item].panoramaStatus != DFStatusConstants.COMPLETED {
            self.panoramaStatusLabelFunc(cell: cell, index: indexPath.item, bgColor: UIColor().hexColor(DFColorConstants.PANORAMA_STATUS_UPLOADING_AND_PROCESSESING))
            cell.capturedPanoramasImages.contentMode = .scaleAspectFit
            cell.capturedPanoramasImages.image = self.capturedPanoramasImage[0]
            cell.capturedPanoramasLabel.text = panoramaList[indexPath.item].name
        } else if self.panoramaList[indexPath.item].name == DFStatusConstants.ADD_PANORAMA {
            cell.panoramaStatusLabel.isHidden = true
            cell.capturedPanoramasImages.contentMode = .center
            cell.capturedPanoramasImages.image = self.capturedPanoramasImage[1]
            cell.capturedPanoramasLabel.text = panoramaList[indexPath.item].name
        }
        return cell
    }

和 panoramaStatusLabelFunc() 函数。

func panoramaStatusLabelFunc(cell: DFCapturedPanoramasCollectionViewCell, index: Int, bgColor: UIColor){
        cell.capturedPanoramasLabel.isHidden = false
        cell.panoramaStatusLabel.layer.backgroundColor = bgColor.cgColor
        cell.panoramaStatusLabel.textColor = UIColor().hexColor(DFColorConstants.TEXT_WHITE_COLOR)
        cell.panoramaStatusLabel.layer.cornerRadius = 10
        cell.panoramaStatusLabel.text = self.panoramaList[index].panoramaStatus
    }

Answer 1

发现问题，它处于以下状态 "cell.panoramaStatusLabel.isHidden = true"。出于某种原因，它正在将 isHidden = true 传递给下一个单元格（我不确定，但可能是因为 Asyn）

else if self.panoramaList[indexPath.item].name == DFStatusConstants.ADD_PANORAMA 
{
    cell.panoramaStatusLabel.isHidden = true
    cell.capturedPanoramasImages.contentMode = .center
    cell.capturedPanoramasImages.image = self.capturedPanoramasImage[1]
    cell.capturedPanoramasLabel.text = panoramaList[indexPath.item].name
}

为了解决这个问题，我更改了 panoramaStatusLabelFunc 函数，如下所示：

    func panoramaStatusLabelFunc(cell: DFCapturedPanoramasCollectionViewCell, index: Int, bgColor: UIColor, isAddHotspot: Bool){
        cell.capturedPanoramasLabel.isHidden = false
        cell.panoramaStatusLabel.layer.backgroundColor = bgColor.cgColor
        cell.panoramaStatusLabel.textColor = UIColor().hexColor(DFColorConstants.TEXT_WHITE_COLOR)
        cell.panoramaStatusLabel.layer.cornerRadius = 10
        if(isAddHotspot) {
            cell.panoramaStatusLabel.text = ""
        } else {
            cell.panoramaStatusLabel.text = self.panoramaList[index].panoramaStatus
        }
    }

收集单元格在每次调用 reloadData() 时删除项目 Swift 5

Collection cell removes item on each reloadData() call Swift 5

uicollectionview

ios13

swift5

xcode11

uicollectionreusableview