Xcode 10 swift 4.2 如何从 firebase 存储中获取 imageUrl 并存储在 firebase 数据库中

Question

这是我正在使用的代码

@objc func handleSignUp() {
        guard let email = emailTextField.text, email.characters.count > 0 else { return }
        guard let username = usernameTextField.text, username.characters.count > 0 else { return }
        guard let password = passwordTextField.text, password.characters.count > 0 else { return }

    Auth.auth().createUser(withEmail: email, password: password, completion: { (user, error) in
         if let err = error {
            print("Failed to create user:", err)
            return
        }
        print("Successfully created user:", user?.user.uid)
        //            guard let image = self.plusPhotoButton.imageView?.image else { return }
        //            guard let uploadData = UIImageJPEGRepresentation(image, 0.3) else { return }
        guard let uploadData = self.plusPhotoButton.imageView?.image?.jpegData(compressionQuality: 0.3) else{return}

        let filename = NSUUID().uuidString
        Storage.storage().reference().child("profile_images").child(filename).putData(uploadData, metadata: nil, completion: { (metadata, err) in
             if let err = err {
                print("Failed to upload profile image:", err)
                return
            }
//this code isn't correct for swift4.2
//guard let profileImageUrl = metadata?.downloadURL()?.absoluteString else    { return } 


            func getDownloadURL(from path: String, completion: @escaping (URL?, Error?) -> Void) {
                let storageReference = Storage.storage().reference(forURL: "gs://instagramfirebase-60be5.appspot.com")

                let storageRef = storageReference.child(path).downloadURL(completion: completion)
            }
            print("Successfully uploaded profile image")//,profileImageUrl

            guard let uid = user?.user.uid else { return }
            let dictionaryValues = ["username": username] as [String : Any]//, "profileImageUrl": profileImageUrl
            let values = [uid: dictionaryValues]

            Database.database().reference().child("users").updateChildValues(values, withCompletionBlock: { (err, ref) in

                if let err = err {
                    print("Failed to save user info into db:", err)
                    return
                }

                print("Successfully saved user info to db")
            })
        })
    })
}

截图如下：

我很困惑如何从 firebase 存储中获取 imageUrl 并将其存储在 Xcode 10 swift 4.2

中的 firebase 数据库中

请帮忙，谢谢你的时间。

Answer 1

您可以通过在图片上传的闭包中使用以下代码轻松地下载 url：

storageRef.downloadURL(completion: { (url, error) in
    if let err = error{
       // error happened - implement code to handle it
       print(err)
    } else {
       // no error happened; so just continue with your code
       print(url?.absoluteString) // this is the actual download url - the absolute string
    }

请注意：不要单独存储 downloadURL，因为 Firebase 可以更改 downloadURL 的标记，我建议始终获取完整的存储路径。

希望我能帮到你。

Xcode 10 swift 4.2 如何从 firebase 存储中获取 imageUrl 并存储在 firebase 数据库中

How to get imageUrl from firebase storage and store in firebase database in Xcode 10 swift 4.2

xcode

firebase

swift

xcode10

swift4.2