AWS ios SDK-将对象上传到AWS S3

我正在尝试按照“上传对象”下面列出的步骤进行操作：http : //docs.aws.amazon.com/mobile/sdkforios/developerguide/s3transfermanager.html

但是，我将其转换为Swift，因为这是我编写整个应用程序的内容。我想出了以下代码，但是当我运行它时，没有任何内容上传到我指定的存储桶中。不幸的是，我什至没有收到错误，这使故障排除变得很困难-您可以在下面看到我正在尝试将任何错误打印到控制台，但是myBFTask.error最终为空。同时myBFTask.result也为null。对于上下文，此代码全部在imagePickerController didFinishPickingMediaWithInfo内部。任何关于下一步寻找的技巧将不胜感激。

        var pickedURL:NSURL = info[UIImagePickerControllerMediaURL] as NSURL
        println("here's the url for the picked media: \(pickedURL)")

        //make a timestamp variable to use in the key of the video I'm about to upload
        let date:NSDate = NSDate()
        var unixTimeStamp:NSTimeInterval = date.timeIntervalSince1970
        var unixTimeStampString:String = String(format:"%f", unixTimeStamp)
        println("this is my unix timestamp as a string: \(unixTimeStampString)")

        var myTransferManagerRequest:AWSS3TransferManagerUploadRequest = AWSS3TransferManagerUploadRequest()
        myTransferManagerRequest.bucket = "kikfli1.videolist"
        myTransferManagerRequest.key = "\(self.fbid)_\(unixTimeStampString)"
        myTransferManagerRequest.body = pickedURL

        var myBFTask:BFTask = BFTask()
        var myMainThreadBFExecutor:BFExecutor = BFExecutor.mainThreadExecutor()
        var myTransferManager:AWSS3TransferManager = AWSS3TransferManager()
        myTransferManager.upload(myTransferManagerRequest).continueWithExecutor(myMainThreadBFExecutor, withBlock: { (myBFTask) -> AnyObject! in
            println("I'm inside the completion block")
            if((myBFTask.result) != nil){
                println("upload was successful?")
            }else{
                println("upload didn't seem to go through..")
                var myError = myBFTask.error
                println("error: \(myError)")
            }
            return nil
        })

这是打印到我的控制台的内容：

用户选择了要提交的视频！

这是所选媒体的网址：file：xxxxxxxxxxxxxxx.MOV（显然是实际文件路径）

这是我的unix时间戳，作为字符串：1417506382.414219

我在完成区里面

上传似乎没有完成。

错误零