无法在 Firebase 存储上获取上传图片的网址答案

【问题标题】：Not able to get the url of uploaded image on firebase storage无法在 Firebase 存储上获取上传图片的网址
【发布时间】：2021-01-13 18:15:55
【问题描述】：

class FCMStorage {

var storage: Storage!

init() {
    storage = Storage.storage()
}

func storeImage(data: Data?, name: String, completion: @escaping ((String?, Error?)->Void)) {

    guard let data = data else {
        return
    }
    let metaData = StorageMetadata()
    metaData.contentType = "image/jpeg"
    let path = "images/" + name
    print("img to store = \(path)")
    let ref = storage.reference()
    let uploadTask = ref.child(path).putData(data, metadata: metaData) { (metadata, error) in
        
        if error == nil {
            print(metadata as Any)
            ref.downloadURL(completion: { (url, error) in
                completion(url?.absoluteString, error)
            })
        } else {
            print("storeImage error: \(error!)")
        }

    }
    
    uploadTask.observe(.progress) { (snapshot) in
        print((snapshot.progress?.fractionCompleted ?? 0) * 100.0)
        if snapshot.status == .success || snapshot.status == .failure {
            uploadTask.removeAllObservers(for: .progress)
        }
    }
 }
}

使用able类，我可以成功地将图像上传到firebase，我也可以在firebase上看到上传的图像但是......

当我调用 downloadURL() 方法时，它总是给我以下错误

ref.downloadURL(completion: { (url, error) in
   completion(url?.absoluteString, error)
})

错误：无法检索下载 URL。

任何人都可以帮助我解决这个问题！

编辑

当我打印文件的元数据时，它会打印以下内容......

FIRStorageMetadata 0x283f99860：{

bucket = "sportoilic.appspot.com";

contentDisposition = "inline; filename*=utf-8''8E13A816-FAF1-47ED-8F84-94BBB8C4C77F";

contentEncoding = identity;

contentType = "application/octet-stream";

generation = 1601287237056536;

md5Hash = "VgMH6NMPGJT//LCD8goaDA==";

metageneration = 1;

name = "8E13A816-FAF1-47ED-8F84-94BBB8C4C77F";

size = 114787;

timeCreated = "2020-09-28T10:00:37.056Z";

updated = "2020-09-28T10:00:37.056Z";

}

然后当我尝试获取上传图片的下载网址时

有什么问题？我在这里遗漏了什么吗？

【问题讨论】：

标签： ios swift firebase-storage

【解决方案1】：

经过几个小时的反复试验，终于得到了解决方案。

class FCMStorage {

var ref: StorageReference!

init(path: String) {
    ref = Storage.storage().reference(withPath: path)
    print("img to store at path = \(path)")
}

func storeImage(data: Data?, completion: @escaping ((String?, Error?)->Void)) {

    guard let data = data else {
        return
    }
    
    let uploadTask = ref.putData(data, metadata: nil) { (metadata, error) in
        
        if error == nil {
            print(metadata as Any)
            
            self.ref.downloadURL(completion: { (url, error) in
                completion(url?.absoluteString, error)
            })
        } else {
            print("storeImage error: \(error!)")
        }

    }
    
    uploadTask.observe(.progress) { (snapshot) in
        print((snapshot.progress?.fractionCompleted ?? 0) * 100.0)
        if snapshot.status == .success || snapshot.status == .failure {
            uploadTask.removeAllObservers(for: .progress)
        }
    }
  }
}

所以存储图像只需要这样调用...

  let path = "images/" + UUID().uuidString
    FCMStorage(path: path).storeImage(data: data) { (imgUrl, error) in
                
          if let strUrl = imgUrl, error == nil {
             FCMDatabase.init(OfTable: .chatRooms).setImageUrl(strUrl: strUrl, teamId: self.team?.id ?? 0, forMsgId: self.arrChats.last?.messageId ?? "") { (isDone) in
                        
                if isDone {
                         print("Image url set in database")
                        }
                    }
                } else {
                    print("Error: \(error?.localizedDescription ?? "Error while getting image url")")
                }
      }

【讨论】：