SDWebImage取消下载

Question

I am using SDWebimage to load images on my tablkeview I am following this tutorial

Now I stuck on a problem,If I scroll down and hit back before images get loaded the app got crashes.How can I solve this ?

How to cancel the SDWebImage download. I have gone through some answers and discussions.But none of them helped me and could not use them

Please help me

I am using

  [cell.UserImage setImageWithURL:[NSURL URLWithString:[SDWebArray objectAtIndex:indexPath.row]]  placeholderImage:[UIImage imageNamed:@"Placeholder.png"]];

Answer 1

In your cell, you can cancel the image load if it's going to get re-used. In your UITableViewCell subclass add the following:

-(void)prepareForReuse {
    [super prepareForReuse];
    [self.imageView cancelCurrentImageLoad]; // UIImageView for whatever image you need to cancel the loading for
}

Be sure to #import "UIImageView+WebCache.h" as well.

Though your app shouldn't be crashing, but I cannot help you without seeing some code, since it's not possible to pinpoint the cause of the crash from your description above.

Answer 2

 - (void)cancelAll
{
    for (SDWebImageDownloader *downloader in downloaders) {
    [downloader cancel];
    }
    [cacheDelegates removeAllObjects];
    [cacheURLs removeAllObjects];

    [downloadInfo removeAllObjects];
    [downloadDelegates removeAllObjects];
    [downloaders removeAllObjects];
    [downloaderForURL removeAllObjects];
}

Answer 3

在加载SDWebImage时放入以下代码行：

[self.imageView cancelCurrentImageLoad];

Answer 4

SWIFT 4.0

self.imageView.sd_cancelCurrentImageLoad()

In case you are using SDWebImage Activity Indicator and wants to remove that as well

self.imageView.sd_removeActivityIndicator()