gistfile1.m

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"Cell";
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
    }
    
    // set the image of the image view asynchronously
    [cell.imageView setImageWithURL: [NSURL URLWithString:@"https://url/to/image.jpg"] placeholderImage:[UIImage imageNamed:@"placeholder"]];
    return cell;
}