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我将 UICollectionView 用于图像网格外观。滚动时我发现那里出现了重复的图像。我正在使用 NYXProgressiveImageView 下载和显示图像。我已经实现了在搜索中找到的几种方法..

这是我的代码

- (MyCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
     MyCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"CELL" forIndexPath:indexPath];
     if (cell == nil)
    {
        cell = [[MyCell alloc]init];
         [cell.imgv setImage:nil];

    }
     NSMutableDictionary *d=[[NSMutableDictionary alloc]initWithDictionary:[arrSubCatAndItems objectAtIndex:indexPath.item]];
         [cell.imgv setImage:nil];
     cell.imgv.cakeIndex=indexPath.item;
     cell.cellLabel.text = [d objectForKey:@"Name"];
     return cell;
}

Mycell 是具有 ImageView 和标签 init 的自定义 UICollectionViewCell 类在滚动时加载这样的可见图像

 - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
{
      _isDragging=NO;
    if (!decelerate)
    {
        _isDragging=YES;
        [self loadimages];
    }
}
 - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
     CGPoint contentOffset = testscroll.contentOffset;
    CGRect  contentFrame  = testscroll.bounds;
    contentFrame.origin = contentOffset;
    if(!_isDragging)
     [self loadimages];
}

   -(void)loadimages
    {
              for (UICollectionViewCell *cell in [collectionview visibleCells]) {
            NSIndexPath *indexPath = [collectionview indexPathForCell:cell];

            MyCell *cell1 = (MyCell*)[collectionview cellForItemAtIndexPath:indexPath];
            NSMutableDictionary *d=[[NSMutableDictionary alloc]initWithDictionary:[arrSubCatAndItems objectAtIndex:indexPath.item]];

                      [cell1.imgv loadImageAtURL:[NSURL URLWithString:[[d objectForKey:@"ImageUrl"]stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]];

          }
    }

如果我在 Imageview 中加载图像时滚动集合视图，则主要问题出现在下面的单元格中

我不知道我哪里出错了...... UICollectionView 的新手......请提前帮助我..Tnx

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