从Alamofire的resumeData开始

Question

你好，我正面临这个问题，我想通过resumeData发出alamofire请求，因此我编写了这段代码，但是我得到了这种错误类型的表达是模棱两可的，没有更多的上下文“。”

响应块，这就是我知道的，因为如果statemnt和。，则downloadRequest在其中。

当我拿出响应并将其设置为正常下载而没有恢复数据时，找不到响应，一切都很好，我该怎么办？

 func StartDownload (with resumeData: Data? = nil) {
    let fileUrl = self.getSaveFileUrl(fileName: Data[0] as String)
    let destination: DownloadRequest.DownloadFileDestination = { _, _ in
        return (fileUrl, [.removePreviousFile, .createIntermediateDirectories])
    }

        if let resumeData = resumeData {
            downloadRequest = Alamofire.download(resumingWith: resumeData, to: destination)
        } else {
            downloadRequest = Alamofire.download(Data[0] as String , to:destination)
        }


         .downloadProgress { (progress) in

         self.progressCircle.progress = progress.fractionCompleted

        }


        .response { defaultDownloadResponse in

            if let error = defaultDownloadResponse.error {
                print("someThing went wrong \(error)")
                if let resumeDataa = defaultDownloadResponse.resumeData {
                    self.self.resumeData.updateValue(resumeDataa as NSData, forKey: self.Data[0])

                }
                return
            }

            if self.Data.count >= 2 {
                self.Data.removeFirst()
                self.startButton.isHidden = false
                self.pauseButton.isHidden = true
                self.resumeButton.isHidden = true

            }
            else if self.Data.isEmpty == true {
                return
            }
            else {
                self.Data.removeLast()
                self.startButton.isHidden = true
                self.pauseButton.isHidden = true
                self.resumeButton.isHidden = true
            }

            self.progressCircle.progress = 0
            self.progressLabel.text = "0%"
            self.stateLabel.text = "Downloaded"
            self.downloadTableView.reloadData()
            self.SaveData()

    }
    }