プログラミング初心者です。初めて質問させて頂きます。  
Swift 4（Xcode 9.4） Alamo FireでMultipartFromDataを使用し画像送信したいのですが、  
提携の構文がわからず、お教えて頂けましたら幸いです。  
宜しくお願いいたします。

```

    import Alamofire
    
    public func uploadMultipartFromData(parameters: [[String: Any]]) {
        let url = "http://127.0.0.1:8000/"
        let urlRequest = URL(string: url)!
        let headers: HTTPHeaders = [
            "name": "value"
        ]
    
        let parameters: Parameters = [
            "str_param": "str value",
            "num_param": 0,
            "nested": [
                "nested_param": "value"
            ]
        ]
    
        Alamofire.request(url,
                          method: .post,
                          parameters: parameters,
                          encoding: JSONEncoding.default,
                          headers: headers)
            .authenticate(user: "user", password: "password")
            .responseJSON { response in
    
                if
                    let json = response.result.value as? [String: Any],
                    let prop1 = json["prop1"] as? String
                {
                    debugPrint(prop1)
                }
    
                debugPrint(response)
        }
    
        func appendMultipartFormData(multipartFormData: MultipartFormData, element: [String: Any]) {
        switch element["value"] {
        case let image as UIImage:
            var imageData: Data
            var mimeType: String
            if element["extension"] as! String == "jpg" {
                print(element["extension"] as! String)
                imageData = UIImageJPEGRepresentation(image, 1.0)!
                mimeType = "jpeg"
            } else {
                imageData = UIImagePNGRepresentation(image)!
                mimeType = "png"
            }
            multipartFormData.append(
                imageData,
                withName: element["key"] as! String,
                fileName: element["name"] as! String,
                mimeType: mimeType
            )
        default:
            let value = element["value"] as! String
            multipartFormData.append((value.data(using: .utf8))!, withName: element["key"] as! String)
            break
        }
    }
    
        func uploaldMultipartProcess(upload: UploadRequest, completeNotificationName: NSNotification.Name) {
        upload
            .uploadProgress(closure: { (progress) in
                print("Upload Progress: \(progress.fractionCompleted)")
            })
            .validate(statusCode: 200..<300)
            .validate(contentType: ["application/json"])
            .responseJSON { (response: DataResponse<Any>) in
                let statusCode = response.response?.statusCode
                print("Success: \(response.result.isSuccess)")
                print("Status code: \(String(describing: statusCode))")
        }
    
    }
    
```
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2018-06-08T01:24:18.500
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2018-06-08T01:43:53.293
2018-06-08T01:43:53.293
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question
swift swift4
Swift 4（Xcode 9.4） Alamo FireでMultipartFromDataを使用し画像送信したい