Question

我是Firebase的新手，我在这里遇到问题。

我已经成功将图像上传到Firebase存储，但是，我需要立即获取downloadurl并将其发布到数据库中。而且我不确定为什么它在该闭包中不起作用。

以下是我的代码：-

   func CreateNewChatRoom(user: User, caption: String, data: Data){
    let filePath = "\(user.uid)/\(Int(NSDate.timeIntervalSinceReferenceDate)).jpg"
    let metaData = StorageMetadata()
    metaData.contentType = "image/jpg"
    let reference = storageRef.child(filePath)

    reference.putData(data, metadata: metaData) { (metadata, error) in
        if let error = error {
            print("\(error.localizedDescription)")
            return
        }
        reference.downloadURL(completion: { (url, error) in
            if let error = error{
                print("Error : \(error.localizedDescription)")
                return
            }
            else{
                if let downloadURL = url?.absoluteString {
                    let idRoom = self.BASE_REF.child("rooms").childByAutoId()
                    idRoom.setValue(["caption":caption, "thumbnailUrlFromStorage": self.storageRef.child(metadata!.path!).description,"fileUrl": downloadURL])
                }
            }
        })

    }

}

Answer 1

我遇到了同样的问题，并且找到了以下解决方案，我希望它对某人有用。斯威夫特5

导入FirebaseAuth 导入FirebaseStorage 导入FirebaseFirestore

typealias AddStoryResult =（Bool，Error？）->无效类型别名UploadImageResult =（StorageMetadata ?, Error？）->无效

StoryFirebaseAPI类{

static let storage = Storage.storage()
static var downloadUrlString: URL?
var image: UIImage?

let photoUri = "smth uri path"

uploadImage(image, photoUriString: photoUri) { (metadata: StorageMetadata?, error: Error?) in
    
    guard let metadata = metadata else {
        if let error = error {
            print("Error occured: \(error)")
        }
        completion(false, error)
        return
    }

    // and at this point I have print(downloadUrlString)
    
    completion(true, nil)
}

}

扩展StoryFirebaseAPI {

func uploadImage(_ image: UIImage, photoUriString: String, completion: @escaping UploadImageResult) {
    
    guard let imageData = image.jpegData(compressionQuality: 0.5) else {
        print("smth error")
        completion(nil, nil)
        return
    }
    
    let storageRef = storage.reference().child(photoUriString)
    
    let imageMetadata = StorageMetadata()
    imageMetadata.contentType = "image/jpeg"
    
    storageRef.putData(imageData, metadata: imageMetadata) { (storageMetadata, error) in
        
        if let error = error {
            print("Error: \(error.localizedDescription)")
            completion(nil, error)
            return
        }
        
        guard let unwrappedMetadata = storageMetadata else {
            print("smth error")
            print("Error: \(error?.localizedDescription ?? "")")
            completion(nil, error)
            return
        }
        
        
        storageRef.downloadURL { url, error in
            if let error = error {
                print("Error: \(error.localizedDescription)")
                completion(nil, error)
                return
            } else {
                if let url = url {
                    downloadUrlString = url
                    completion(unwrappedMetadata, nil)
                }
            }
        }
        print("Image uploaded successfully")
    }
}

}

成功上传文件后，Firebase Storage的downloadURL为零

1 个答案: