SDWebImage does not load remote images until scroll

Question

I am using SDWebImage library to load remote images into a table view which uses a custom cell class i have created. I simply use

[cell.imageView setImageWit         


        

Answer 1

This is an example and you need to implement this for your purpose.
your UITableView delegate:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    YourCustomTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"YourCustomTableViewCellReuseIdentifier"];

    if (!cell)
    {
        cell = [[[YourCustomTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
                               reuseIdentifier:CellIdentifier];        
    }

    NSString *imageURL = // ... get image url, typically from array
    [cell loadImageWithURLString:imageURL forIndexPath:indexPath]; 

    return cell;
}

your custom UITableViewCell .h file:

#import 
#import "UIImageView+WebCache.h"
#import "SDImageCache.h"

@interface YourCustomTableViewCell
{
    NSIndexPath *currentLoadingIndexPath;
}

- (void)loadImageWithURLString:(NSString *)urlString forIndexPath:(NSIndexPath *)indexPath;

@end

your custom UITableViewCell .m file:

// ... some other methods

- (void)loadImageWithURLString:(NSString *)urlString forIndexPath:(NSIndexPath *)indexPath
{
    currentLoadingIndexPath = indexPath;
    [self.imageView cancelCurrentImageLoad];
    [self.imageView setImage:nil];

    NSURL *imageURL = [NSURL URLWithString:urlString];
    [self.imageView setImageWithURL:imageURL
                   placeholderImage:nil
                            options:SDWebImageRetryFailed
                          completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType)
    {
        if (currentLoadingIndexPath != indexPath)
        {
            return;
        }

        if (error)
        {
            ... // handle error
        }
        else
        {
            [imageView setImage:image];
        }
    }];
}

// ... some other methods

currentLoadingIndexPath needed to detect if we reuse this cell for another image instead of image which was downloaded while user scrolls the table view.