iOS 延迟加载表格图像

问题描述

我已经使用苹果提供的示例在我的应用中成功实现了图像的延迟加载 这里.问题是，我希望在滚动时加载图像，但仅当我完成拖动时图像才会加载到单元格中(从屏幕上松开手指.在此之前单元格保持为空).我将代码修改如下:

I have successfully implemented lazy-loading of images in my app using the example provided by apple here. The thing is that, I want the image to load as I am scrolling, but the image loads into the cell only when I finish dragging (Release my finger from the screen. Until then the cell remains empty). I have modified the code as follows:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{

    //NSLog(@"cell for row at indexpath, size - %f, current - %d", flowTable.contentSize.height, self.current);

    NSString *CellIdentifier = @"FlowCell";

    MyFlowCell *cell = (MyFlowCell *)[self.flowTable dequeueReusableCellWithIdentifier:CellIdentifier];

    if (cell == nil) {

        NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"FlowCell" owner:nil options:nil];
       // cell = [nib objectAtIndex:0];

        for(id currentObject in nib)

        {

        if([currentObject isKindOfClass:[MyFlowCell class]])

        {
            cell = (MyFlowCell *)currentObject;

            break;
        }
        }
    }

    ImageDetails *rowItem = [self.imageData objectAtIndex:indexPath.row];

    if (!rowItem.mainImage)
    {  
       // if (self.flowTable.dragging == NO && self.flowTable.decelerating == NO)
       // {

            [self startIconDownload:rowItem forIndexPath:indexPath];

        /