图像未上传并将图像快速传递到服务器

Question

在服务器中加载imagepicker图像，我尝试了一些正在运行的代码，我选择了要发送到Api的图像，图像参数是File类型，因此如何在File类型中传递图像。

如何将其成像为文件格式？我尝试了很多方法，但没有解决方法。
像这样的api呼叫

 kycupload(title1:String, first_name:String,last_name:String,middel_name:String,gender:String, idprofdesc:String,idnumber:String, addprofdesc:String,address:String, address2:String,city:String, state:String,pincode:String,nationality:String,idproofimage:String, addressproofimage:String,pan_no:String)


func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
            var urlString = " "
            if let imgUrl = info[UIImagePickerControllerImageURL] as? URL{
                let imgName = imgUrl.lastPathComponent
                let documentDirectory = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first
                let localPath = documentDirectory?.appending(imgName)
                let image = info[UIImagePickerControllerOriginalImage] as! UIImage
                let data = UIImagePNGRepresentation(image)! as NSData
                data.write(toFile: localPath!, atomically: true)
                //let imageData = NSData(contentsOfFile: localPath!)!
                let photoURL = URL.init(fileURLWithPath: localPath!)//NSURL(fileURLWithPath: localPath!)
               urlString = String(describing: photoURL)
              idproofimage = urlString

            }
       let param: Parameters = [
        "usrtoken":"9V4ymEO6GgjIqQUHFps8fGvmJbX7Abcu-bdf3fd65c81469f9b74cedd497f2f9cehHKHPiR2h",
                                      "title": "Mr",
                                      "firstName": "naga",
                                      "lastName": "take",
                                      "middleName": "",
                                      "gender": "male",
                                      "idprofdesc": "aadhaar",
                                      "idNumber": "393435724657",
                                      "addprofdesc": "passport",
                                      "address": "address",
                                      "address2": "address",
                                      "city": "cuz",
                                      "state": "gagalkj",
                                      "nationality": "agalkbaflg",
                                      "pincode": "123112",
                                      "pan_no": "12312312",
                                      "Idproofimage":urlString,
                                      "Addressproofimage":""]
            Alamofire.upload(multipartFormData: { (multipartFormData) in
                multipartFormData.append(imageData!, withName: "file", fileName: "swift_file.png", mimeType: "image/png")
                for (key, value) in param {
                    multipartFormData.append("\(value)".data(using: String.Encoding.utf8)!, withName: key)
                }
            }, to: "http://3.130.85.122/api/v1/user/sxp/account/kyc-upload")
            { (result) in
                switch result {
                case .success(let upload, _, _):
                    upload.uploadProgress(closure: { (progress) in
                        print("uploading \(progress)")
                    })
                    upload.responseJSON { response in
                        print("the success full daa",response.result)
                    }
                case .failure( _): break
                    print("error message")
                }
            }
            mainimage = pickedImage
            let cell = Tableview.cellForRow(at: path) as! CustomTableviewCell
            cell.documentImage?.image = nil
            Tableview.reloadData()
            picker.dismiss(animated: true, completion: nil)
        }

当我尝试上面的代码时，会得到这种结果：

  

响应状态：400
  {
        错误= {
              idproofimage =（
                  “ ID证明图像必须是文件。”
              ）;
           ;
          };
      }

如何将图像传递给我的API？