Swift Firebase存储和存储问题；数据库

我有一个应用程序，带有

UpdateProfileViewController

（iOS应用程序，用Swift编写）。我使用Firebase存储和数据库作为后端。我面临的问题是，我有两个图像需要上传到Firebase存储，然后获取下载URL并将其输入该特定用户的数据库中。现在，我面临三个问题

downloadURL

方法应返回指向存储器中上载图像的URL，并将其分配给变量

storageHeaderDownloadedURL

，另一个变量是

headerImgDownloadedURL

（这些应该是标题和配置文件图像）

我想更新所有字段，不管用户是否更改了某些内容，只需更新整个用户配置文件即可

我希望能够压缩图像，使它们在大小方面更小，而不是质量，所以用户不上传非常大的图像

这是我的全部代码，我希望有人能帮我解决这个问题，因为我花了2天时间，但我仍然无法解决这些问题：

    @IBAction func savePressed(_ sender: UIBarButtonItem)
{
    updateUserProfile()
}


func updateUserProfile ()
{
    if let userID = FIRAuth.auth()?.currentUser?.uid
    {
        // Note: Storage references to profile images & profile headers folder
        let storageUserProfileID = Storage.storage.profile_images.child(userID)
        let storageUserHeaderID = Storage.storage.profile_headers.child(userID)


        guard let imageProfile = profileImage.image else { return }

        guard let headerImage = headerImage.image else { return }

        var storageProfileDownloadedURL: String = ""
        var storageHeaderDownloadedURL: String = ""


        if let newProfileImage = UIImagePNGRepresentation(imageProfile), let newHeaderImage = UIImagePNGRepresentation(headerImage)
        {
            storageUserProfileID.put(newProfileImage, metadata: nil, completion: { (metadata, error) in

                if error != nil
                {
                    showAlert(title: "Oops!", msg: (error?.localizedDescription)!, actionButton: "OK", viewController: self)
                    return
                }
                // Get the URL from the storage
                storageUserProfileID.downloadURL(completion: { (url, error) in

                    if error != nil
                    {
                        showAlert(title: "Oops!!!", msg: (error?.localizedDescription)!, actionButton: "OK", viewController: self)
                        return
                    }
                    if let profileImgDownloadedURL = url?.absoluteString
                    {
                        storageProfileDownloadedURL = profileImgDownloadedURL
                    }
                })
            })
            storageUserHeaderID.put(newHeaderImage, metadata: nil, completion: { (metadata, error) in

                if error != nil
                {
                    showAlert(title: "Oops!", msg: (error?.localizedDescription)!, actionButton: "OK", viewController: self)
                    return
                }

                // Get the URL from the storage
                storageUserHeaderID.downloadURL(completion: { (url, error) in

                    if error != nil
                    {
                        showAlert(title: "Oops!!!", msg: (error?.localizedDescription)!, actionButton: "OK", viewController: self)
                        return
                    }
                    else
                    {
                        if let headerImgDownloadedURL = url?.absoluteString
                        {
                            storageHeaderDownloadedURL = headerImgDownloadedURL
                        }
                    }
                })
            })

            //Note: Update the info for that user in Database

        }

        guard let newDisplayName = self.displayNameTextField.text else { return }
        guard let newLocation = self.locationTextField.text else { return }
        guard let newDescription = self.bioTextField.text else { return }
        guard let newWebsite = self.websiteTextField.text else { return }
        guard let newBirthday = self.birthdayTextField.text else { return }

        let newUpdatedUserDictionary = ["imageProfile": storageProfileDownloadedURL,
                                        "imageHeader" : storageHeaderDownloadedURL,
                                        "description" : newDescription,
                                        "location": newLocation,
                                        "displayName": newDisplayName,
                                        "website": newWebsite,
                                        "birthday": newBirthday,
                                        ]
        Database.dataService.updateUserProfile(uid: userID, user: newUpdatedUserDictionary)
        print("Successfully updated!")
        showAlert(title: "Profile updated", msg: "YAASS", actionButton: "OK", viewController: self)

    }
}