在表视图中显示来自Odata的图像

Question

enter image description here我正在尝试使用 swift 4 创建基于购物车的应用，在表视图中显示来自oData的产品列表，odata的元素之一包含Image的URL

使用以下代码我试图在picUrl变量中生成URL

var picUrl = String()
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

        let cell = tableView.dequeueReusableCell(withIdentifier: "ContactCell", for: indexPath) as! FUIContactCell

        let product = self.entities[indexPath.row]

picUrl = ("https://\(self.hurl)\(product.pictureUrl! as String)"   )

 if let url = URL(string: picUrl){

        downloadImage(url: url)
}

cell.detailImage = #imageLiteral(resourceName: "Image.png")
cell.detailImage = self.imageView.glyphImage


   func getDataFromUrl(url: URL, completion: @escaping (Data?, URLResponse?, Error?) -> ()) {
        URLSession.shared.dataTask(with: url) { data, response, error in
            completion(data, response, error)
            }.resume()
    }

    func downloadImage(url: URL) {
        //print("Download Started")
        getDataFromUrl(url: url) { data, response, error in
         //   guard let data = data, error == nil else { return }
          print(response?.suggestedFilename ?? url.lastPathComponent)
           print("Download Finished")
            DispatchQueue.main.async() {

                self.imageView = (UIImage(data: data!))!

                }
        }
    }

downloadImage（url：url）从url调用图像。

但不知怎的，我收到错误enter image description here