错误13010使用getData（）从Firebase存储下载jpeg图像时“对象不存在”

Question

语言：Swift 5

监督办：13.2

MacOS：Catalina 10.15.4

Firebase存储规则：

service firebase.storage {
  match /b/{bucket}/o {
    match /{allPaths=**} {
      allow read, write: if request.auth!=null;
    }
  }
}

上传图像和保存下载URL的代码：（这工作很好，因为我可以看到图像上传到存储区，它们各自的下载URL存储到实时数据库。）

        let storageRef = Storage.storage().reference()

        //Let's upload all workout pictures
        let uploadPicsRef = 
        storageRef.child("WORKOUTDATA/USERS/"+self.UID!).child("WHITEBOARDWORKOUTS")

        let uploadNumberRef = uploadPicsRef.child("\(String(describing: workoutNum))")
        let workoutPicturesRef = uploadNumberRef.child("WORKOUTPICTURES")
        let workoutPicURLRef = workoutRef.child("WORKOUTPICTURESURL")
        var count = 0
        var picNumber = 0

        //workoutPictures list/array contains images selected from iPhone Gallery, using 
        //UIImagePickerController
        for workoutPic in self.workoutPictures
        {
            let workoutPicData = workoutPic.jpegData(compressionQuality: 1.0)!
            count = count + 1
            let pictureName = "Picture\(count).jpg"

            // Upload the file to the path in pictureRef
            let pictureRef = workoutPicturesRef.child("\(pictureName)")

            let metaData = StorageMetadata()
            metaData.contentType = "image/jpg"
            pictureRef.putData(workoutPicData, metadata: metaData) { (metadata, error) in
                if error != nil {
                    print("Error while uploading image")
                }
                else
                {
                    pictureRef.downloadURL { (url, err) in
                        picNumber = picNumber + 1
                        workoutPicURLRef.child("Picture\(picNumber)").setValue(url?.absoluteString)
                    }
                }
            }
        }

下载图像的代码：

        let myGroup = DispatchGroup()

        let workoutPicUrls = snapshot.childSnapshot(forPath: "WORKOUTPICTURESURL")

        for url in workoutPicUrls.children
        {
            myGroup.enter()
            let snap = url as! DataSnapshot
            let link = snap.value as? String
            let storageRef = Storage.storage().reference()
            let pictureRef = storageRef.root().child(link!)

            DispatchQueue.main.async {
                pictureRef.getData(maxSize: 1*2000000*2000000) { (data, err) in
                if (err != nil) {
                    print(err!)
                    print(err!.localizedDescription)

                } else {
                let pic = UIImage(data: data!)
                workoutPicsArray.append(pic!)
                myGroup.leave()
                }
            }
            }
        }

错误：

错误域=FirStorageErrorDomain代码=-13010“对象https://firebasestorage.googleapis.com/v0/b/trainer-8cb52.appspot.com/o/workoutdata%2fusers%2f1k7wv1alyiewpasfc6ymojkpfsj1%2fwhiteboardworkouts%2f5%2fworkoutpicts%2fpicture1.jpg？alt=介质&标记=785ab8c7-1e08-4ad3-a542-c9e6313eb547不存在。”userinfo={object=https:/firebaseStorage.googleapis.com/v0/b/trainer-8cb52.appspot.com/o/workoutdata%2fusers%2f1k7wv1alyiewpasfc6ymojkpfsj1%2fwhiteboardworkouts%2f5%2fworkoutpicts%2fpicture1.jpg？alt=介质&标记=785ab8c7-1e08-4ad3-a542-c9e6313eb547,responsebody={“错误”：{“代码”：404,“消息”：“找不到.

到目前为止我所尝试的：

1. 检查了firebase存储规则。
2. 当我在chrome浏览器窗口中粘贴路径https://firebasestorage.googleapis.com/v0/b/trainer8cb52.appspot.com/o/workoutdata%2fusers%2f1k7wv1alyiewpasfc6ymojkpfsj1%2fwhiteboardworkouts%2f5%2fworkoutpicts%2fpicture1.jpg？alt=media&token=785ab8c7-1e08-4ad3-a542-c9e6313eb547时，将打开预期的图像。
3. 将maxSize设置为高得离谱的数字1*2000000*2000000。

谢谢！

Answer 1

您是否可能将完整的https URL存储在数据库中，并试图通过将完整的https URL作为子级添加到存储引用中来创建引用？

我认为您应该尝试在数据库中存储路径和名称，或者更改下载代码以使用https URL。

       // Create a reference from an HTTPS URL
       // Note that in the URL, characters are URL escaped!
       let httpsReference = storage.reference(forURL: "https://firebasestorage.googleapis.com/b/bucket/o/images%20stars.jpg")

       httpsReference.getData(maxSize: ...

此外，您还在dispatchqueue.main.async中运行getData方法。getData本身有一个完成处理程序，可能需要一些时间，当您在DispatchQueue.main.async中运行该处理程序时，它将阻塞您的代码，直到下载完成。仅将更新UI的代码放在dispatchqueue.main.async中。在您的情况下，只要您对workoutPicsArray或UIImage执行某些操作以更新视图，就可以立即执行。

看一下这里，看看你是否能弄清楚你实际上是如何尝试获取数据的。在每一行后面加上一个print（）可能会有帮助，以查看您在什么地方创建和使用了什么内容。

在iOS上下载文件