Flutter 异步任务在WorkManager CallbackDispatcher中不工作

我正在使用WorkManager进行后台服务。我的代码如下

void callbackDispatcher() {
  Workmanager.executeTask((task, inputData) async {
    switch (task) {
      case "uploadLocalData":
        print("this method was called from background!");
        await BackgroundProcessHandler().uploadLocalData();
        print("background Executed!");
        return true;
       
        break;
      case Workmanager.iOSBackgroundTask:
        print("iOS background fetch delegate ran");
        return true;
        break;
    }
    return false;
   
  });
}

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有没有办法在executeTask中等待async方法？

异步化非异步内容的方法是通过完成符。你创建了一个完成者，等待它的未来，并在未来完成它

Completer uploadCompleter = Completer();

void callbackDispatcher() {
  Workmanager.executeTask((task, inputData) async {
    switch (task) {
      case "uploadLocalData":
        print("this method was called from background!");
        await BackgroundProcessHandler().uploadLocalData();
        print("background Executed!");
        uploadCompleter.complete();
        return true;
       
        break;
      case Workmanager.iOSBackgroundTask:
        print("iOS background fetch delegate ran");
        return true;
        break;
    }
    return false;
   
  });
}

// somewhere else
await uploadCompleter.future;

---

刚刚添加了

等待上传完成器.future上传到
uploadCompleter.complete（），这对我来说非常有效。谢谢@gazihanalankus我很高兴它能帮上忙，但我不明白：）如果你
等待uploadCompleter.future之前
uploadCompleter.complete（），它将永远无法到达
uploadCompleter.complete（），对吗？我也很震惊，bcoz概念上是错的，。。但这对我很管用。