如何使用PHP和Swift 5解析JSON

Question

我正在通過PHP在我的應用程序中解析JSON，我的消息傳遞中心工作正常，但現在它停止工作了。 我正在使用Swift 5，PHP和MySQL。

當我嘗試在應用程序中查看頁面時，出現JSON錯誤，

“無法讀取數據，因為格式不正確”。

使用相同代碼的其他頁面不存在此問題。

我嘗試了JSONSerialization不同屬性，但沒有任何效果。

Swift 5代碼從php加載消息

func loadMessages() {


    let username = user!["username"] as! String
    let url = URL(string: "https://www.xxxx.com/messagecenter.php")!
   var request = URLRequest(url: url)

    request.httpMethod = "POST"
    let body = "username=\(username)"
    request.httpBody = body.data(using: String.Encoding.utf8)

    URLSession.shared.dataTask(with: request) { data, response, error in

        DispatchQueue.main.async(execute: {

            if error == nil {

                do {

                    let json : NSDictionary? = try JSONSerialization.jsonObject(with: data!, options: .allowFragments) as? NSDictionary

                    self.tableView.reloadData()

                    guard let parseJSON = json else {
                        print("Error while parsing")
                        return
                    }

                    guard let messages = parseJSON["messages"] as? [AnyObject] else {
                        print("Error while parseJSONing")
                        return
                    }
                   self.hhmessages = messages

                    for i in 0 ..< self.hhmessages.count {

                    let path = self.hhmessages[i]["ava"] as? String

                        if !path!.isEmpty {
                            let url = URL(string: path!)!

                            let imageData = try? Data(contentsOf: url) 
     let image = UIImage(data: imageData!)! 
     self.avas.append(image) // append found image to [images] var
                        } else {
                            let image = UIImage()

                            self.avas.append(image) 

                        }

                    }

      self.tableView.reloadData()


                } catch {
                    Helper().showAlert(title: "JSON Error", message: error.localizedDescription, in: self)
                    return
                }

            } else {
            }

        })

        }.resume()

}

PHP代碼

$access->connect();
$returnArray = array();
if (!empty($_REQUEST["uuid"]) && empty($_REQUEST["id"])) {


// STEP 2.1 Get uuid of post and path to post picture passed to this php file via swift POST
$uuid = htmlentities($_REQUEST["uuid"]);
//$path = htmlentities($_REQUEST["path"]);

// STEP 2.2 Delete post according to uuid
$result = $access->deleteMessage($uuid);

if (!empty($result)) {
    $returnArray["message"] = "Successfully deleted";
    $returnArray["result"] = $result;

} else {
    $returnArray["message"] = "Could not delete post";
}

 }
 else {

// STEP 2.1 Pass POST / GET via html encrypt and assign passed id of user to $id var
$username = htmlentities($_REQUEST["username"]);


// STEP 2.2 Select posts + user related to $id
$messages = $access->messageCenter($username);

// STEP 2.3 If posts are found, append them to $returnArray
if ($messages) {
    $returnArray['messages'] = $messages;
}

}
       //   STEP 3. Close connection
 $access->disconnect();


 // STEP 4. Feedback information
 echo json_encode($returnArray);

 ?>

該代碼應為用戶顯示收件箱。

Answer 1

使用以下步驟解決了該問題：

1. 打印的print（String（data：data !, encoding：.utf8））
2. 錯誤消息顯示我的文件被GoDaddy阻止
3. 將我的頁面添加到了Godaddy安全門戶的白名單中
4. 有效。