如何在Swift 3中将值作为NSDictionary获取？

Question

如何在Swift 3 whit Alamofire中将值作为NSDictionary？ 我想借值就像NSDictionary中JSON和它们保存到默认，然后看到一个TableView中的一切

PHP代码

public function getProdottiByUsername($username) 
{ 
    $stmt = $this->conn->prepare("SELECT username, id_prodotto, nome_prodotto, categoria, quantita FROM listaprodotti WHERE username = ?"); 
    $stmt->bind_param("s", $username); 
    $stmt->execute(); 
    $result = $stmt->get_result(); 
    $i=0; 
    $prodotti = array(); 
    while($row = $result->fetch_array(MYSQLI_ASSOC)){ 
     $prodotti[$i]['username'] = $row['username']; 
     $prodotti[$i]['id_prodotto'] = $row['id_prodotto']; 
     $prodotti[$i]['nome_prodotto'] = $row['nome_prodotto']; 
     $prodotti[$i]['categoria'] = $row['categoria']; 
     $prodotti[$i]['quantita'] = $row['quantita']; 
     $i++; 
    } 
return $prodotti; 
} 

} 

这就是我得到

{"error":false,"user":{"id":3,"username":"anto","email":"a@a","nome":"Anto","cognome":"xxx","telefono":"1234567892"},"prodotti":[{"username":"anto","id_prodotto":57,"nome_prodotto":"milk","categoria":"milk","quantita":"2"},{"username":"anto","id_prodotto":58,"nome_prodotto":"farina","categoria":"alimento","quantita":"2"}]} 

SWIFT代码

import Alamofire 
import UIKit 
import AVFoundation 

class LoginController1: UIViewController { 

//The login script url make sure to write the ip instead of localhost 
//you can get the ip using ifconfig command in terminal 
let URL_USER_LOGIN = "http://........login.php" 

//the defaultvalues to store user data 
let defaultValues = UserDefaults.standard 

//the connected views 
//don't copy instead connect the views using assistant editor 
@IBOutlet weak var labelMessage: UILabel! 
@IBOutlet weak var username: UITextField! 

@IBOutlet weak var password: UITextField! 

//the button action function 
@IBAction func buttonLogin(_ sender: UIButton) { 

    //getting the username and password 
    let parameters: Parameters=[ 
     "username":username.text!, 
     "password":password.text! 
    ] 

    //making a post request 
    Alamofire.request(URL_USER_LOGIN, method: .post, parameters: parameters).responseJSON 
     { 
      response in 
      //printing response 
      print(response) 

      //getting the json value from the server 
      if let result = response.result.value { 
       let jsonData = result as! NSDictionary 

       //if there is no error 
       if(!(jsonData.value(forKey: "error") as! Bool)){ 

        //getting the user from response 
        let user = jsonData.value(forKey: "user") as! NSDictionary 


        //getting user values 
        let userId = user.value(forKey: "id") as! Int 
        let userName = user.value(forKey: "username") as! String 
        let userEmail = user.value(forKey: "email") as! String 
        let userNome = user.value(forKey: "nome") as! String 
        let userCognome = user.value(forKey: "cognome") as! String 
        let userTelefono = user.value(forKey: "telefono") as! String 



        //saving user values to defaults 
        self.defaultValues.set(userId, forKey: "userid") 
        self.defaultValues.set(userName, forKey: "username") 
        self.defaultValues.set(userEmail, forKey: "useremail") 
        self.defaultValues.set(userNome, forKey: "usernome") 
        self.defaultValues.set(userCognome, forKey: "usercognome") 
        self.defaultValues.set(userTelefono, forKey: "usertelefono") 


        ///prende i valori dei prodotti dalla cella legata a quel username 
        let row = jsonData.value(forKey: "row") as! NSDictionary 



        let rowNome_prodotto = prodotti.value(forKey: "nome_prodotto") as! String 
        let rowCategoria = prodotti.value(forKey: "categoria") as! String 
        let rowQuantita = prodotti.value(forKey: "quantita") as! String 



        //saving i valori di questo username 


        self.defaultValues.set(prodottiNome_prodotto, forKey: "nome_prodotto") 
        self.defaultValues.set(prodottiCategoria, forKey: "categoria") 
        self.defaultValues.set(prodottiQuantita, forKey: "quantita") 



        //Go to the HomeViewController if the login is sucessful 
        let ProfiloController = self.storyboard?.instantiateViewController(withIdentifier: "Profilo") as! ProfiloController 
        self.navigationController?.pushViewController(ProfiloController, animated: true) 

        self.dismiss(animated: false, completion: nil) 

        }else{ 
              //error message in case of invalid credential 
        let alertController = UIAlertController(title: "Error", message: "Username e password sbagliati", preferredStyle: .alert) 
        let defaultAction = UIAlertAction(title: "OK", style: .cancel, handler: nil) 
        alertController.addAction(defaultAction) 

        self.present(alertController, animated: true, completion: nil) 
        } 
      } 
       } 
} 






override func viewDidLoad() { 
    super.viewDidLoad() 
    if defaultValues.string(forKey: "username") != nil{ 
     let ProfiloController = self.storyboard?.instantiateViewController(withIdentifier: "Profilo") as! ProfiloController 
     self.navigationController?.pushViewController(ProfiloController, animated: true) 

    } 
} 


    var player: AVPlayer? 
    override func viewDidAppear(_ animated: Bool) { 
     super.viewDidAppear(animated) 





    let tap = UITapGestureRecognizer(target: self, action: #selector(LoginController1.dismissKeyboard)) 
    view.addGestureRecognizer(tap) 
    let path = Bundle.main.path(forResource: "introoiphone 7 plus", ofType: "mp4") 
    player = AVPlayer(url: URL(fileURLWithPath: path!)) 
    player!.actionAtItemEnd = AVPlayerActionAtItemEnd.none; 
    let playerLayer = AVPlayerLayer(player: player) 
    playerLayer.frame = self.view.frame 
    playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill 
    self.view.layer.insertSublayer(playerLayer, at: 0) 
    NotificationCenter.default.addObserver(self, selector: #selector(LoginController1.playerItemDidReachEnd), name: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: player!.currentItem) 
    player!.seek(to: kCMTimeZero) 
    player!.play() 

} 

func playerItemDidReachEnd() { 
    player!.seek(to: kCMTimeZero) 
} 



func dismissKeyboard(tap: UITapGestureRecognizer) { 
    print("Keyboard Dismiss Again") 
    view.endEditing(true) 
} 
override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 
    // Dispose of any resources that can be recreated. 
} 

} 

Answer 1

您需要将字符串转换为JSO N然后获得价值。以下是获取用户级别信息的示例。不要忘记处理展开:)

let str = "{\"error\":false,\"user\":{\"id\":3,\"username\":\"anto\",\"email\":\"a@a\",\"nome\":\"Anto\",\"cognome\":\"xxx\",\"telefono\":\"1234567892\"},\"prodotti\":[{\"username\":\"anto\",\"id_prodotto\":57,\"nome_prodotto\":\"milk\",\"categoria\":\"milk\",\"quantita\":\"2\"},{\"username\":\"anto\",\"id_prodotto\":58,\"nome_prodotto\":\"farina\",\"categoria\":\"alimento\",\"quantita\":\"2\"}]}" 

let data = str.data(using: .utf8) 

do{ 
    let json = try JSONSerialization.jsonObject(with: data!, options: []) as? [String: Any] 

    let userDic = json?["user"] as? [String: Any] 
    dump(userDic?["id"]) 
    dump(userDic?["username"]) 
}catch let error{ 

}