如何在 Swift iOS 中提取来自 PHP 后端的 JSON 响应值

Question

我使用 almofire 上传了一张图片，它正在上传到我需要的正确路径。

但是，我需要将 PHP 后端代码中的一些响应放入我的 swift 中，例如 filepath.

一张图片可以让我的问题更清楚和准确地了解我想从 .responseJSON

中得到什么

下图中是我对 PHP 代码的响应，我想获取 swift 中文件路径的值。我怎样才能做到这一点？

这是我的代码：

PHP:

<?php

if (empty($_FILES["image"])) {
    $response = array("error" => "nodata");
}

else {
    $response['error'] = "NULL";
   
    $filename = uniqid() . ".jpg";
 
    if (move_uploaded_file($_FILES['image']['tmp_name'], "../propertyImages/" . $filename)) {
   
        $response['status'] = "success";
        $response['filepath'] = "https://example.com/WebService/propertyImages/" . $filename;
        $response['filename'] = "".$_FILES["file"]["name"];

} else{
   
    $response['status'] = "Failure";
    $response['error']  = "".$_FILES["image"]["error"];
    $response['name']   = "".$_FILES["image"]["name"]; 
    $response['path']   = "".$_FILES["image"]["tmp_name"];
    $response['type']   = "".$_FILES["image"]["type"];
    $response['size']   = "".$_FILES["image"]["size"];
  }
}

echo json_encode($response);
?>

Swift代码：

 self.imageData = propImage.image!.jpegData(compressionQuality: 0.5)!
        
        let headers: HTTPHeaders = [
                    "Content-type": "multipart/form-data"
                ]

                    AF.upload(
                        multipartFormData: { multipartFormData in
                            multipartFormData.append(self.imageData!, withName: "image" , fileName: "file.jpg", mimeType: "image/jpeg")
                    },
                        to:"https://example.com/WebService/api/uploadPropImage.php", method: .post , headers: headers)
                        .responseJSON { resp in
                            //let responseString: String = String(data: self.imageData!, encoding: .utf8)!
                            print(resp) //this prints all the responses from the PHP code, my problem is how do i get a specific response, such as the filepath only and so on?
            }

编辑：

我尝试了一些解决方案，这个似乎是可行的，但仍然显示错误读取

"No exact matches in call to class method 'jsonObject'"

更新代码：

AF.upload(multipartFormData: { multipartFormData in                           multipartFormData.append(self.imageData!, withName: "image" , fileName: "file.jpg", mimeType: "image/jpeg")},                      to:"https://example.com/WebService/api/uploadPropImage.php", method: .post , headers: headers).responseJSON {
   result in
                        
 do{
   if let jsonResults = try JSONSerialization.jsonObject(with: result, options: []) as? [String: Any] { //error in this line
 let filePath = jsonResults["filepath"] as? String 
                            }
          }catch{
         print("ERROR")
     }

Answer 1

然后解码您的回复：

if let jsonResults = try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any] {
    let filePath = jsonResults["filepath"] as? String // here is your value
}

Answer 2

responseJSON块的值是Result。这是一个经常使用的基本概念，因此您需要学习如何处理它。通常的做法是使用 switch.

let headers: HTTPHeaders = ["Content-type": "multipart/form-data"]

AF.upload(multipartFormData: { multipartFormData in
    multipartFormData.append(self.imageData!, withName: "image" , fileName: "file.jpg", mimeType: "image/jpeg")
                             },
                              to:"https://example.com/WebService/api/uploadPropImage.php", method: .post , headers: headers)
   .responseJSON { result in
    switch result {
        case .success(let json):
            guard let dictionary = json as? [String: Any] else { print("Response JSON is not a dictionary"); return }
            guard let filePath = json["filePath"] as? String else { print("filePath key is not present in "\(json)" or is not a String");  return }
            print("Filepath: \(filePath)")
        case .failure(let error):
            print("Error: \(error)")
    }

}

现在，最好使用 Codable 结构来解析您的响应并调用 responseDecodable() 而不是使用 responseJSON()，后者将使用 JSONSerialization 方法顺便说一句，已弃用，将在下一个 Alamofire 主要版本中删除。

如何在 Swift iOS 中提取来自 PHP 后端的 JSON 响应值

How to Extract JSON Response Values Coming From PHP Backend in Swift iOS

php

json

httpresponse

ios

swift