Enviar Imagen con Alamo Fire

Question

Deseo enviar可以在IOS上进行图像处理，没有Deseo recodificarla a BASE64，deseo enviarla como“文件”

他打算用Alamofire.upload禁运我，直到siguiente错误：“无法调用类型为'（UIImage，withName：String）'的参数列表的'append'” manda el错误“表达式类型在没有更多上下文的情况下是模棱两可的”，el codigo utilizado es el siguiente：

func uploadMultiformData1（）{

    //variables
    let usuario = "alfred"
    let datosAdd = "otros datos"
    //endRegion

    //parameters
    let parametros =
        [
            "idUsuario": usuario,
            "aditionalData": datosAdd
            ] as [String : AnyObject]

    //endRegion

//图片省：@IBOutlet弱var mainImageView：UIImageView！

    let image = mainImageView.image
    let imageData = image!.pngData()

    // CREATE AND SEND REQUEST ----------

    Alamofire.upload(multipartFormData: { (multipartFormData) in
        for (key, item) in parametros {
            multipartFormData.append(item.data(using:.utf8)!, withName: key)
        }

        multipartFormData.append(imageData!, withName: "image", fileName: "swift_file.jpeg", mimeType: "image/jpeg")
    }, to:url)
    { (result) in
        switch result {
        case .success(let upload, _, _):

            upload.uploadProgress(closure: { (Progress) in
                print("Upload Progress: \(Progress.fractionCompleted)")
            })

            upload.responseJSON { response in
                //self.delegate?.showSuccessAlert()
                print(response.request)  // original URL request
                print(response.response) // URL response
                print(response.data)     // server data
                print(response.result)   // result of response serialization
                //                        self.showSuccesAlert()
                //self.removeImage("frame", fileExtension: "txt")
                if let JSON = response.result.value {
                    print("JSON: \(JSON)")
                }
            }

        case .failure(let encodingError):
            //self.delegate?.showFailAlert()
            print(encodingError)
        }

    }

}

EL结果查询： 1.图片浏览和使用ImageView 2. Adjuntarla al envio en tipo POST 3. El servidor responsee JSON