快速登录 PHP 的 POST 连接

Question

我是 Swift 的新手，我正在尝试在后端使用 PHP 创建安全登录。但是在我出错的地方，即使我没有提供登录凭据并在控制台中收到以下错误，我的视图控制器也会切换到下一个视图控制器：请帮忙！！

错误域=

NSCocoa错误域代码=3840 "JSON 文本未以数组或对象开头，并且未设置允许片段的选项。"UserInfo={NSDebugDescription=JSON 文本未以数组或对象开头，并且未设置允许片段

的选项

我的代码：

@IBAction func loginAuthentication(sender: UIButton) {
            //declare parameter as a dictionary which contains string as key and value combination. considering inputs are valid
            let myUrl = NSURL(string: "my url");
            var request = NSMutableURLRequest(URL:myUrl!)
            request.HTTPMethod = "POST"// Compose a query string
            let postString = "username = ( NameTextField.text!) & password = ( passwortTextField.text!) ";
            request.HTTPBody = postString.dataUsingEncoding(NSUTF8StringEncoding)

            let task = NSURLSession.sharedSession().dataTaskWithRequest(request){ data , response , error in
                if error != nil
                                {
                                let alert = UIAlertView()
                                alert.title = "Login Failed!"
                                alert.message = "Error: (error)"
                                alert.delegate = self
                                alert.addButtonWithTitle("OK")
                                alert.show()
                                return
                                }
        // You can print out response object
        print("*****response = (response)")
        let responseString = NSString(data: data! , encoding: NSUTF8StringEncoding )
                if ((responseString?.containsString("")) != nil) {
                    print("incorrect - try again")
                    let alert = UIAlertController(title: "Try Again", message: "Username or Password Incorrect", preferredStyle: .Alert)
                    let yesAction = UIAlertAction(title: "Nochmalversuchen", style: .Default) { (action) -> Void in
                    }

            // Add Actions
            alert.addAction(yesAction)

            // Present Alert Controller
            self.presentViewController(alert, animated: true, completion: nil)
                }
                else {
                      print("correct good")
                      let storyboard = UIStoryboard(name: "Main", bundle: nil)
                      let controller = storyboard.instantiateViewControllerWithIdentifier("toPflegerProfile")
                      self.presentViewController(controller, animated: true, completion: nil)
                    }
            print("*****response data  = (responseString)")
            do {
            //create json object from data
                if let json = try NSJSONSerialization.JSONObjectWithData(data!, options: .MutableContainers) as? [String: Any] {
                    if let email = json["UserName"] as? String,
                    let password = json["passowrd"] as? String {
                    print ("Found User id:  called (email)")
                    }
                }
            } catch let error {
            print(error)
        }
    }
    task.resume()
}

PHP代码 ：

 <?php
  require_once 'db.php';
  $conn = connect();
  if($conn)
   {

     if (isset($_GET['loginuser']))
      {
       //Getting post values
       require_once 'getuserdata.php';
       //1.Check if user is looged in
       $loggedin = checkuserloggedin($username, $conn);
       if ($loggedin)
         {
         $response['error']=true;
         $response['message']='User is already logged in!';
        }
    else
     {
      //2.If not, insert pfleger
       //Inserting log in values
      if (insertuserdata($name,$username, $password, $gps, $logintime,    $conn)) 
       {
        $response['error']=false;
        $response['message']='Log Data added successfully';
      }
      else
      {
        $response['error']=true;
        $response['message']='Could not add log in data';
      }
    }
    }
  else
     {
      $response['error']=true;
      $response['message']='You are not authorized';
      }
 echo json_encode($response);
 ?>

Answer 1

使用这个

   var request = URLRequest(url: URL(string: “url”)!)
   request.httpMethod = "POST"
   let userName = self.emailTextField.text!
   let password = self.passtextField.text!
   let postString = NSString(format: "emailId=%@&password=%action=%@",userName, password,”action name”)
   request.httpBody = postString.data(using: String.Encoding.utf8.rawValue)
    let task = URLSession.shared.dataTask(with: request) { data, response, error in
        guard let data = data, error == nil else {                                                 // check for fundamental networking error
            print("error=(error)")
            return
        }
        if let httpStatus = response as? HTTPURLResponse, httpStatus.statusCode != 200 {           // check for http errors
            print("statusCode should be 200, but is (httpStatus.statusCode)")
            print("response = (response)")
        }
        do {
            let jsonResults : NSDictionary = try JSONSerialization.jsonObject(with: data, options: [])as! NSDictionary
            print("login json is ---%@",jsonResults)
            let str = jsonResults.object(forKey: "status")as! String
            if (str == "Success")
            {
            let newdic:NSDictionary = jsonResults.object(forKey: "response") as! NSDictionary
        } catch {
            // failure
                print("Fetch failed: ((error as NSError).localizedDescription)")
            }
            }
            task.resume()