Ios CollectionView图像在滚动时闪烁

我在我的

collectionView中使用了以下代码：cellForItemAtIndexPath:

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *identifier = @"Cell";
    
    UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
    
    UIImageView *recipeImageView = (UIImageView *)[cell viewWithTag:100];
    recipeImageView.image = nil;
    if ([ImageArray count] >0){
        
            dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^(void) {
                NSData *data0 = [NSData dataWithContentsOfURL: [NSURL URLWithString:[ImageArray objectAtIndex:indexPath.row]]];
                UIImage *image = [UIImage imageWithData: data0];
                
                dispatch_sync(dispatch_get_main_queue(), ^(void) {
                    recipeImageView.image = image;
                });
            });
        
    }
    
    [spinnerShow stopAnimating];
    
    cell.layer.shouldRasterize = YES;
    cell.layer.rasterizationScale = [UIScreen mainScreen].scale;
    
    return cell;
}

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问题是，如果我滚动集合视图，图像会闪烁。为什么会这样？我怎样才能防止在Im滚动图像时图像闪烁？

我认为根本原因是加载下面两行图像的成本：

NSData *data0 = [NSData dataWithContentsOfURL: [NSURL URLWithString:[ImageArray objectAtIndex:indexPath.row]]];
UIImage *image = [UIImage imageWithData: data0];

我的解决方案是使用AFNetworking加载图像处理，请参考链接：

安装AFNetworking后，您只需：

if ([ImageArray count] >0){
    [recipeImageView setImageWithURL:[NSURL URLWithString:[ImageArray objectAtIndex:indexPath.row]] placeholderImage:nil];
}

---

希望你喜欢这个

我认为根本原因是加载下面两行图像的成本：

NSData *data0 = [NSData dataWithContentsOfURL: [NSURL URLWithString:[ImageArray objectAtIndex:indexPath.row]]];
UIImage *image = [UIImage imageWithData: data0];

我的解决方案是使用AFNetworking加载图像处理，请参考链接：

安装AFNetworking后，您只需：

if ([ImageArray count] >0){
    [recipeImageView setImageWithURL:[NSURL URLWithString:[ImageArray objectAtIndex:indexPath.row]] placeholderImage:nil];
}

---

希望你喜欢这个

隐藏这些行cell.layer.shouldRasterize=YES；cell.layer.rasterizationScale=[UIScreen mainScreen]。比例；并尝试隐藏这些行cell.layer.shouldRasterize=YES；cell.layer.rasterizationScale=[UIScreen mainScreen]。比例；再试一次