在 Alamofire 中上传多张图片

Question

我想使用 Alamofire 将多张图片上传到服务器。

一切正常，但是，只上传了一张图片。我需要上传多张或更多图片，具体取决于登录用户。我正在使用一个名为 DKImagePickerController 的库从画廊或相机中挑选图像。

func upload() {

    //shortcuts
    let id = userr.integer(forKey: "id")
    let plateId = plateIdTextField.text!
    let customerName = customerNameTextField.text!
    let customerContact = customerContactTextField.text!
    let package = radioButtonsController.selectedIndex + 1

    var parameters: [String: Any]
    parameters = ["user_id": id,
                  "package": package,
                  "plate_id": plateId,
                  "customer_name": customerName,
                  "customer_contact": customerContact]

    let spinningActivity = MBProgressHUD.showAdded(to: self.view, animated: true)
    spinningActivity?.labelText = "uploading.."
    spinningActivity?.detailsLabelText = "Please wait"

    Alamofire.upload(multipartFormData: { multipartFormData in

        for fileImage in self.fileUIImage {
            multipartFormData.append(UIImagePNGRepresentation(fileImage)!, withName: "image", fileName:"image.png", mimeType: "image/png")
        }

        for (key, value) in parameters {
            multipartFormData.append("\(value)".data(using: String.Encoding.utf8)!, withName: key as String)
        }
    },
                     to: uploadURL,
                     method: HTTPMethod(rawValue: "POST")!,
                     encodingCompletion: { encodingResult in
                        switch encodingResult {

                        case .success(let upload, _, _):

                            upload.responseJSON { response in

                                //Unpacking
                                guard let result = response.result.value else { return }
                                spinningActivity!.hide(true)
                                print("\(result)")
                                self.BackToHomePage()
                            }
                        case .failure(let encodingError):
                            print(encodingError)
                        }
    })
}

Answer 1

发送多个文件有两种方法。

您可以为每个文件使用唯一的 name（在本例中，name 值为 image0、image1 等） :

for (index, image) in images.enumerated() {
    multipartFormData.append(UIImagePNGRepresentation(image)!, withName: "image\(index)", fileName: "image\(index).png", mimeType: "image/png")
}

结果是 $_FILES：

$_FILES =     {
    image0 =         {
        error = 0;
        name = "image0.png";
        size = 23578;
        "tmp_name" = "/tmp/php1bc19G";
        type = "image/png";
    };
    image1 =         {
        error = 0;
        name = "image1.png";
        size = 338685;
        "tmp_name" = "/tmp/phpcGS5d6";
        type = "image/png";
    };
};

（忽略此输出的格式，而只关注此嵌套目录结构中的 key/value 组合：就此输出而言，我让网络服务发送 $_FILES 回来作为 JSON，然后我让 Alamofire 解析它，这就是生成的字典在我的客户端应用程序中的输出方式。）

或者，您可以通过在字段名称后包含 [] 来为 name 使用数组，例如字面意思 image[]:

for (index, image) in images.enumerated() {
    multipartFormData.append(UIImagePNGRepresentation(image)!, withName: "image[]", fileName: "image\(index).png", mimeType: "image/png")
}

这导致在服务器上收到以下内容：

$_FILES =     {
    image =         {
        error =             (
            0,
            0
        );
        name =             (
            "image0.png",
            "image1.png"
        );
        size =             (
            23578,
            338685
        );
        "tmp_name" =             (
            "/tmp/phpI4XrwU",
            "/tmp/php3kVhhl"
        );
        type =             (
            "image/png",
            "image/png"
        );
    };
};

这仅取决于 Web 服务期望如何创建请求。

在 Alamofire 中上传多张图片

Upload multiple images in Alamofire

multipartform-data

swift

alamofire