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

I just had to solve this exact problem and didn't want the overhead of the prefetcher. There must be some extra under-the-hood stuff happening with the built-in imageView property that prevents the loading, because a new UIImageView works just fine.

My solution is pretty clean if you don't mind (or are already) using a subclass of UITableViewCell:

1. Subclass UITableViewCell.
2. In your subclass, hide self.imageView.
3. Create your own UIImageView subview and set this view's image.

Here's a modified version of my own code (undocumented here is setting the frame to match the size & position of the iOS Photo app's album covers):

YourTableCell.h

@interface YourTableCell : UITableViewCell
    @property (nonatomic, strong) UIImageView *coverPhoto;
@end

YourTableCell.m

@implementation YourTableCell

@synthesize coverPhoto;

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        self.imageView.image = nil;
        self.coverPhoto = [[UIImageView alloc] init];

        // Any customization, such as initial image, frame bounds, etc. goes here.        

        [self.contentView addSubview:self.coverPhoto];
    }
    return self;
}
//...
@end

YourTableViewController.m

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    YourTableCell *cell = (YourTableCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    //...
    [cell.coverPhoto setImageWithURL:coverUrl placeholderImage:nil options:SDWebImageCacheMemoryOnly];
    //...
}