Swift 4-使用URLSession获取上载图像进度

我在下面有这样的代码

func upload(){
    let img = UIImage(named: "1")
    let imgData = UIImageJPEGRepresentation(img!, 1)
    let data = imgData?.base64EncodedString()

    var request = URLRequest(url: URL(string: url)!)
    request.httpMethod = "POST"
    request.setValue("\(auth)", forHTTPHeaderField: "Authorization")
    request.setValue("application/xml", forHTTPHeaderField: "Content-Type")

    var postString = "<uploadrequest>"
    postString += "<folderid>123</folderid>"
    postString += "<folder_name>images</folder_name>"
    postString += "<image_byte>\(data!)</image_byte>"
    postString += "</uploadrequest>"

    request.httpBody = postString.data(using: .utf8)

    let configuration = URLSessionConfiguration.default
    let session = URLSession(configuration: configuration, delegate: self, delegateQueue: OperationQueue.main)

    let task = session.uploadTask(with: request, from: imgData!, completionHandler: {
        (data, response, error) -> Void in

        if let error = error {
            print(error)
            return
        }
        if let data = data {
            _ = self.parseJsonData(data: data)
        }
    })

    task.resume()
}

func urlSession(_ session: URLSession, task: URLSessionTask, didSendBodyData bytesSent: Int64, totalBytesSent: Int64, totalBytesExpectedToSend: Int64) {
    print("sent:", totalBytesSent, "from:", totalBytesExpectedToSend)

    let size = totalBytesSent / totalBytesExpectedToSend
    self.progressbar.progress = Float(size)
}

我的目标是使用API上传图像,并获得其上传进度。图像转换为base64并插入到 <image_byte>\(data!)</image_byte> 在API的poststring上。

然后我得到的是这样的:

发送:32768发件人:927220 发送:65536发件人:927220 发送:131072发件人:927220 发送:163840发件人:927220 发送:262144发件人:927220 发送:294912发件人:927220 发送:360448发件人:927220 发送:393216发件人:927220 发送:425984发件人:927220 发送:491520发件人:927220 发送:524288发件人:927220 发送:557056发件人:927220 发送:589824发件人:927220 发送:622592发件人:927220 发送:655360发件人:927220 发送:688128发件人:927220 发送:720896发件人:927220 发送:786432发件人:927220 发送:819200发件人:927220 发送:851968发件人:927220 发送:927220发件人:927220 Error Domain=NSCocoaErrorDomain Code=3840“JSON文本未以数组或对象开头,并且未设置允许片段的选项。” UserInfo={NSDebugDescription=JSON文本未以数组或开头 对象和选项,以允许未设置片段。}

但是如果我使用其他类似的方法(没有uploadTask),它工作得很好,但没有上传进度。

let task = URLSession.shared.dataTask(with: request, completionHandler: {
        (data, response, error) -> Void in

        if let error = error {
            print(error)
            return
        }
        if let data = data {
            _ = self.parseJsonData(data: data)
        }
    })

我试过了 Alamofire 也 阿拉莫菲尔 具有 request 功能成功,但仍然没有提供上载进度,并且 阿拉莫菲尔 具有 upload 函数(multipartformData)出现以下错误:

我想知道我的代码是否出错。你能告诉我该怎么处理我的代码吗?或者问题是我的API,因为我的API只接受 base64 密码

如果你想看看我的 阿拉莫菲尔 代码,它是 there

拜托,谁来帮我解决这个问题。

谢谢!:)

编辑1

这是我通过请求功能得到的结果(无上载功能)

{
    "media_preview" =     {
        "image_media" =         {
            fileid = 4928501;
            filename = "zhzvoHBb1ogda9bps13R5IavYiadCm.jpg";
            folderpath = "product\\66861/images800\\";
            height = 533;
            src = "zhzvoHBb1ogda9bps13R5IavYiadCm.jpg";
            width = 800;
        };
        "medium_media" =         {
            fileid = 4928503;
            filename = "zhzvoHBb1ogda9bps13R5IavYiadCm.jpg";
            folderpath = "product\\66861/images500\\";
            height = 333;
            src = "zhzvoHBb1ogda9bps13R5IavYiadCm.jpg";
            width = 500;
        };
        "small_media" =         {
            fileid = 4928503;
            filename = "zhzvoHBb1ogda9bps13R5IavYiadCm.jpg";
            folderpath = "\product\\66861/images300\\";
            height = 200;
            src = "/zhzvoHBb1ogda9bps13R5IavYiadCm.jpg";
            width = 300;
        };
        "source_media" =         {
            fileid = 4928499;
            filename = "zhzvoHBb1ogda9bps13R5IavYiadCm.jpg";
            folderpath = "\\product\\66861images\\";
            height = 666;
            src = "/zhzvoHBb1ogda9bps13R5IavYiadCm.jpg";
            width = 999;
        };
        "thumbnail_media" =         {
            fileid = 4928507;
            filename = "zhzvoHBb1ogda9bps13R5IavYiadCm.jpg";
            folderpath = \\product\\66861/thumb\\";
            height = 150;
            src = "/zhzvoHBb1ogda9bps13R5IavYiadCm.jpg";
            width = 150;
        };
    };
    responsestatus =     {
        "access_token" = "<null>";
        code = 00;
        description = Success;
    };
}

编辑2 这是的代码 parseJsonData(data: Data)

func parseJsonData(data: Data) {
    do {
        let jsonResult = try JSONSerialization.jsonObject(with: data, options: JSONSerialization.ReadingOptions.mutableContainers) as? NSDictionary
        print(jsonResult!)
    } catch {
        print(error)
    }
}