ios - 如何使用 post 方法从登录功能将 JSON 数据传递到另一个 View Controller ？

Question

我在另一个 View Controller 中有空白数据，我可以在 TableView Controller 之间传递数据，但是我在解析来自登录方法的数据并从 JSON 传递访问 token 或用户名时遇到问题？

 @IBOutlet weak var username_textfield: UITextField!
    @IBOutlet weak var password_textfield: UITextField!
var logindata : [Login] = []
 var myResponse  :   JSON    =   nil
func getlogin(){
        let headers = [
            "Content-Type": "application/x-www-form-urlencoded"
        ]
        let parameters = [

            "UserName": username_textfield.text! as String,
            "Password": password_textfield.text! as String,
            "grant_type": "password",
            ]


        //        let url = NSURL(string: "http://192.168.100.5:84/Token")!
        Alamofire.request("http://192.168.100.5:84/Token", method: .post, parameters: parameters, encoding:  URLEncoding.httpBody, headers: headers).responseJSON { (response:DataResponse<Any>) in

            switch(response.result) {
            case.success(let data):
                print("success",data)
                 let statusCode = (response.response?.statusCode)!
                if statusCode == 200{
                    self.view.makeToast(message: "Welcome !!")
                    self.performSegue(withIdentifier: "mainview", sender: self)

                }else{
                    self.view.makeToast(message: "Username or password invalid")
                }
                self.myResponse = JSON(data)
            let login = Login(loginJson: self.myResponse)
            DispatchQueue.main.async(execute: { () -> Void in
                self.performSegue(withIdentifier: "pass_data", sender: login)
            })


            case.failure(let error):
                print("Not Success",error)
            }

        }
    }

将数据传递给另一个 View Controller

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "pass_data" {
        if let eventsVC = segue.destination as? MenuDrawerViewController,
            let loginData = sender as? Login {
            eventsVC.login_details = loginData
        }
    }
}

我有模型课

class Login{

    var access_token = String()
    var token_type = String()
    var expire_in = String()
    var username = String()
    var masterid = String()
    var name = String()
    var access = String()
    var issued = String()
    var expries = String()

    init(loginJson:JSON){
    self.access_token = loginJson["access_token"].stringValue
        self.token_type = loginJson["token_type"].stringValue
        self.expire_in = loginJson["expires_in"].stringValue
        self.username = loginJson["userName"].stringValue
        self.masterid = loginJson["MasterID"].stringValue
        self.name = loginJson["Name"].stringValue
        self.access = loginJson["Access"].stringValue
        self.issued = loginJson[".issued"].stringValue
        self.expries = loginJson[".expires"].stringValue
    }


}

在第二个 View Controller 中我有这样的调用类

class MenuDrawerViewController: UIViewController {
var login_details : Login?
 override func viewDidLoad() {
        super.viewDidLoad()



        titlename_text.text = login_details?.name
        // Do any additional setup after loading the view.
    }
}

I m a bit confused where I'm getting wrong or I'm doing it in wrong way, how it can be solved?

我想通过导航 Controller 传递数据并且不使用导航 Controller 传递数据所以我尝试传递这个函数并且它在“if let detailController”条件下给我错误

override  func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if segue.identifier == "dashboard" {
            let navController = segue.destination as! UINavigationController
           if let detailController = navController.topViewController as! ViewController,
            let loginData = sender as? Login {
                detailController.login_details = loginData
            }
        }
    }

Answer 1

For loop 这里是不必要的，因为你没有得到登录数据数组你需要的是直接使用 self.myResponse 来制作 Login< 的对象。此外，您使用不同的标识符执行 segue 两次，使用相应的目标 Controller 对特定标识符执行 segue。

Alamofire.request("http://192.168.100.5:84/Token", method: .post, parameters: parameters, encoding:  URLEncoding.httpBody, headers: headers).responseJSON { (response:DataResponse<Any>) in

    switch(response.result) {
        case.success(let data):
            print("success",data)
            let statusCode = (response.response?.statusCode)!
            if statusCode == 200{
                self.view.makeToast(message: "Welcome !!")
            }else{
                self.view.makeToast(message: "Username or password invalid")
            }
            self.myResponse = JSON(data)
            let login = Login(loginJson: self.myResponse)
            DispatchQueue.main.async(execute: { () -> Void in
               self.performSegue(withIdentifier: "pass_data", sender: login)
            })
        case.failure(let error):
            print("Not Success",error)
    }
}

现在让你的 prepareForSegue 像这样

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "pass_data" {
        if let eventsVC = segue.destination as? MenuDrawerViewController,
           let loginData = sender as? Login {
              eventsVC.login_details = loginData
        }
    }
}