Ios 通过URL从Swift上的Firebase下载时从侧面加载图像

我目前正在从Firebase上传和下载图像。我将URL作为字符串存储在变量profilePicture中，然后使用URL会话下载图像。但是，每次照片横向加载时。但是，当我最初从相机卷中拾取图片时，它显示的方式是正确的。你知道会发生什么吗

上传图像： 当我上传图像时，一旦它完全保存，我将URL设置为变量profilePicture

    var storageRef : FIRStorageReference = FIRStorageReference()
    if let uid = currentUser?.uid {
        storageRef = FIRStorage.storage().reference().child("\(uid).png")
    }

    if let uploadData = UIImagePNGRepresentation(profilePictureImageView.image!) {

        let uploadTask = storageRef.put(uploadData, metadata: nil) { snapshot, error in
            if let error = error {
                print(error)
            }
        }

        // Shows progress bar until saved
        uploadTask.observe(.progress) { snapshot in
            self.progressBar.observedProgress = snapshot.progress
            self.progressBar.isHidden = false;
        }

        uploadTask.observe(.success) { snapshot in
            if let profileImageURL = snapshot.metadata?.downloadURL()?.absoluteString {
                self.user?.profilePicture = profileImageURL
                self.progressBar.isHidden = true;
                self.savedLabel.isHidden = false

            }
        }
    }

下载图像：

 if let profileImageURL = user?.profilePicture {
        if let url = URL(string: profileImageURL) {
            URLSession.shared.dataTask(with: url, completionHandler: { (data, response, error) in

                if error != nil {
                    print(error!)
                    return
                }

                DispatchQueue.main.async {
                    self.profilePictureImageView.image = UIImage(data: data!)
                    self.activityIndicator.stopAnimating()
                }
            }).resume()
        }
    }

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我有一种感觉，这与图像定位问题有关，而不是Firebase land中的任何问题。差不多