Flutter：获取FirebaseStorage下载URL&上传状态 [英] Flutter: Get FirebaseStorage Download URL & Upload Status

问题描述

我是新手。我正在尝试获取 StorageUploadTask 状态，并在状态为 isCompleted 的状态下下载。 成功。我在网上找到的示例都是旧版本的

I'm new to flutter. I am trying to get StorageUploadTask status and have the Download when is status isCompleted & isSuccessful. The examples I found online are of the old version:

StorageUploadTask uploadTask = ref.putFile(avatarImageFile);
Uri downloadUrl = (await uploadTask.future).downloadUrl;

以上内容不适用于新的 firebase_storage 插件版本。请帮忙。

The above doesn't work for the new firebase_storageplugin version. Please help. Below is my code so far.

StorageUploadTask uploadTask = ref.putFile(avatarImageFile);

    StorageReference downRef = uploadTask.lastSnapshot.ref;
    String downloadUrl = await downRef.getDownloadURL();

    if(uploadTask.isComplete) {
      if(uploadTask.isSuccessful) {
        print('Upload Successful');
      } else if(uploadTask.isCanceled) {
        print('Upload Cancelled');
      } else {
        print('${uploadTask.lastSnapshot.error}');
      }
    } else if(uploadTask.isInProgress){
        print('Upload in Progress');
      } else if(uploadTask.isPaused) {
        print('Upload Paused');
      }

推荐答案

最新版本的插件没有不要再使用 task.future（）了，在文档中他们说要使用 lastSnapshot 为我工作。因此，我使用了 onComplete 。这是可行的解决方案：

The latest version of plugin doesn't let you use task.future() anymore and in the documentation they say to use lastSnapshot which didn't work for me. So, I used onComplete. Here is the working solution:

var ref = FirebaseStorage.instance.ref().child("your_path");
var uploadTask = ref.putFile(avatarImageFile);
var storageTaskSnapshot = await uploadTask.onComplete;
var downloadUrl = await storageTaskSnapshot.ref.getDownloadURL();

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