swift ，火力地堡 : No datas in realtime database after creating user

Question

使用 Xcode 10.1、Swift 4.2 和 Firebase ##

使用以下代码将数据上传到 firebase 后，我在实时数据库中看不到数据:

static func createUser(username: String, email: String, password: String, imageData: Data, onSuccess: @escaping () -> Void, onError: @escaping (_ error: String?) -> Void) {

    Auth.auth().createUser(withEmail: email, password: password) { (data, error) in
        if let err = error {
            onError(err.localizedDescription)
            return
        }
        // User erfolgreich erstellt
        guard let uid = data?.user.uid else { return }
        self.uploadUserData(uid: uid, username: username, email: email, imageData: imageData, onSuccess: onSuccess)
    }
}

static func uploadUserData(uid: String, username: String, email: String, imageData: Data, onSuccess: @escaping () -> Void) {


    let storageRef = Storage.storage().reference().child("profile_image").child(uid)

    storageRef.putData(imageData, metadata: nil) { (metadata, error) in
        if error != nil {
            return
        }
    }

    storageRef.downloadURL(completion:  { (url, error) in
        if  error != nil {
            print(error!.localizedDescription)
            return
        }

        let profilImageURL = url?.absoluteString


        let ref = Database.database().reference().child("users").child(uid)
        ref.setValue(["username" : username, "email" : email, "profileImageURL": profilImageURL ?? "Kein Bild vorhanden"])

    })
     onSuccess()
}

firebase 中的设置:

应该以正确的方式工作。我已经查看了 firebase 文档，但没有找到更多信息。

Answer 1

图像是否上传到云存储？如果是，但下载 URL 没有写入数据库，我猜是因为在生成下载 URL 之前数据没有上传。由于上传函数是异步的，因此应该从闭包中调用 downloadURL 函数。

static func uploadUserData(uid: String, username: String, email: String, imageData: Data, onSuccess: @escaping () -> Void) {

    let storageRef = Storage.storage().reference().child("profile_image").child(uid)

    storageRef.putData(imageData, metadata: nil) { (metadata, error) in
        if error != nil {
            return
        }
        storageRef.downloadURL(completion:  { (url, error) in
        if  error != nil {
            print(error!.localizedDescription)
            return
        }
     onSuccess()
    }
}