UITableViewCell图像未加载

Question

我想从firebase存储下载图像并将其加载到tableview中，但它不工作。我的downloadUrl是正确的，没有错误。

URLSession.shared.dataTask(with: downloadURL) { (data, response, error) in
        if error != nil {
            print(error?.localizedDescription)
            return
        }
        DispatchQueue.main.async {
            if let downloadedImage = UIImage(data: data!) {
                cell.imageView?.image = downloadedImage
            }
        }
    }

Answer 1

为什么不直接使用Firebase Storage内置的下载机制呢?

let httpsReference = FIRStorage.storage().referenceForURL('https://firebasestorage.googleapis.com/b/bucket/o/images%20stars.jpg') // your download URL
httpsReference.dataWithMaxSize(1 * 1024 * 1024) { (data, error) -> Void in
  if (error != nil) {
    // Uh-oh, an error occurred!
  } else {
    // Data for "images/stars.jpg" is returned
    let starsImage: UIImage! = UIImage(data: data!)
    cell.imageView.image = starsImage // by default, callbacks are raised on the main thread so this will work
  }
}