title: how to load image in swift from URL
body: <p>I am passing a URL in string format from firebase to load an image, the url gets passed fine but the cell.articleImage.sd_setImage(with: url, placeholderImage: UiImage(named: "issaimage")) isn't returning the picture from the url, just the placeholder image</p>
  
  <pre><code>func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -&gt; UITableViewCell {
          guard let cell = tableView.dequeueReusableCell(withIdentifier: "articleCell") as? articlesCell else {
              return UITableViewCell()}
  
          let article = articleArray[indexPath.row]
          let url = URL(string: article.imageURL)!
  
          cell.articleImage.sd_setImage(with: url, placeholderImage: UIImage(named: "issaimage"))
  
          cell.configureCell(title: article.ArticleTitle, author: article.author, date: article.date)
  
          return cell
      }
  </code></pre>