在tableviewcell中处理图像的最佳方法[swift]

Question

我的表格视图单元格需要以高分辨率显示10-30张图像（用于打印目的）。当我们有15张照片时，该应用程序得到了内存警告和崩溃。如何在tableview单元格中处理照片的最佳方式，以便应用程序不会崩溃？

班级数据

class dataImage {
    var userId: String
    var value: Double
    var photo: UIImage?
    var croppedPhoto: UIImage?

init(userId:String, value: Double, photo: UIImage?, croppedPhoto: UIImage?){
    self.userId = userId
    self.value = value
    self.photo = photo
    self.croppedPhoto = croppedPhoto
}

}

查看控制器

func loadDataPhoto(){
        for asset in photos{
            autoreleasepool{
            asset.fetchOriginalImageWithCompleteBlock({ image, info in
                let images = image
                let croppedImage: UIImage = self.photoToCrop(image: image!)
                let data1 = dataImage(userId: "goodies\(completed+1)", value: 1.0, photo: images, croppedPhoto: croppedImage)
                datas += [data1]
                print("*")
                //print(data1.userId)
                self.tableView.reloadData()

            })
        }


    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cellIdentifier = "reviewCell"
    let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath: indexPath) as! ReviewTableViewCell

    let data = datas[indexPath.row]
    let tag = indexPath.row
    cell.tag = tag
    autoreleasepool { () -> () in
    cell.imageView.image = data.croppedPhoto
    }
    cell.countStepper.value = datas[indexPath.row].value
    cell.stepperLabel.text = "x \(Int(cell.countStepper.value))"

    cell.delegate = self
    return cell
}