ios - 在 Firebase 上存储图像不起作用

Question

我目前正在尝试将图像上传到 Firebase 存储。目前，图像正在上传，因为我可以从 Firebase 控制台下载它，但是它不允许我在闭包内继续。我不确定这是对 Firebase 的基本误解还是 iOS。让我知道是否可以提供更多信息。

    var storageRef : FIRStorageReference = FIRStorageReference()
    if let num = num {
        storageRef = FIRStorage.storage().reference().child("\(num).png")
    }

    if let uploadData = UIImagePNGRepresentation(profilePictureImageView.image!) {
        let metadata = FIRStorageMetadata()
        metadata.contentType = "image/png"
        print("ABOUT TO STORAGE \(uploadData)")
        storageRef.put(uploadData, metadata: metadata).observe(.success) { (snapshot) in
            print("IN STORAGE")
            let text = snapshot.metadata?.downloadURL()?.absoluteString
        }
    }

我在调试时得到的唯一打印结果是

ABOUT TO STORAGE 8663314 bytes

编辑:过去，我也曾尝试通过以下方式解决此问题:

    if let uploadData = UIImagePNGRepresentation(profilePictureImageView.image!) {
        print("IN UPLOAD DATA \(uploadData)")
        storageRef.put(uploadData, metadata: metadata) { [weak self] (metadata,error) in
            if error != nil {
                print("ERROR \(error)")
                return
            } else {
                print("NO ERROR")
            }

            if let profileImageURL = metadata?.downloadURL()?.absoluteString {
                self?.profilePicURL = profileImageURL
            }
        }
    }

同样，我没有通过“IN UPLOAD DATA”打印语句。

Answer 1

您的图像似乎太大(8.66 MB)。我建议使用进度观察来了解上传数据的进度。使用以下代码。

let uploadTask = storageRef.put(uploadData, metadata: metadata) { snapshot, error in
  if let error = error {
    // Uh-oh, an error occurred!
  } else {
    // Metadata contains file metadata such as size, content-type, and download URL.
    let downloadURL = snapshot!.downloadURL()
  }
}

uploadTask.observe(.progress) { snapshot in
  // A progress event occurred track progress percentage here.
}