swift - 使用 Alamofire swift 登录后如何向我的 UserProfileViewController 显示用户详细信息

Question

我正在开发一个应用程序，其中有 loginViewController 和 UserProfileViewController。登录后，我想使用 NSUserDefaults 在我的 UserProfileVC 上查看我的记录。

注意:在我的 LoginVC 上，我只有 emailTextField 和 PasswordTextField。我想传递来 self 的数据库的名字并将其传递给我的 UserProfileVC

这是我的LoginVC:

  @IBAction func loginAction(sender: AnyObject){

    showLoadingMode (self)

    let email = emailTextField.text
    let password = passwordTextField.text
    let parameters = [
        "email" : email!,
        "password" : password!
    ]

    if (self.emailTextField.text == "" || self.passwordTextField.text == "" ) {
        let alert = UIAlertController(title: "Sign in Failed", message: "Please enter Email Address and Password", preferredStyle: .Alert)
        let okAction = UIAlertAction(title: "Ok", style: .Default, handler: nil)
        alert.addAction(okAction)
        self.presentViewController(alert, animated: true, completion: nil)
        actInd.stopAnimating()
    }
    else
    {

        let url = "http://localhost/alamofire/json-login.php"

    Alamofire.request(.GET, url, parameters: parameters).responseJSON { response in

        if let j = response.result.value {
            actInd.stopAnimating()
            var json = JSON(j)
            print(json)

            let result = json["result"].stringValue

//我想在这里使用 NSUserDefaults 并将其发送到我的 UserProfileVC

            let prefs:NSUserDefaults = NSUserDefaults.standardUserDefaults()
            prefs.setObject(json["firstname"], forKey: "firstname")
            prefs.setObject(email, forKey: "email")
            prefs.setInteger(1, forKey: "ISLOGGEDIN")
            prefs.synchronize()

            if result == "1" {
                self.performSegueWithIdentifier("gotoUserProfile", sender: self);

            }else{

                let alert = UIAlertController(title: "Alert!", message: "Fail", preferredStyle: .Alert)
                let okAction = UIAlertAction(title: "Ok", style: .Default, handler: nil)

                alert.addAction(okAction)

                self.presentViewController(alert, animated: true, completion: nil)

            }
        }

    }
    }}

Answer 1

因此，首先您要创建一个用户模型，您可以在您的应用中重复使用它:

class User {
   var email = ""
   var firstname = ""

   init(email: String, firstname: String) {
       self.email = email
       self.firstname = firstname
   }
}

现在在 LoginVC 的 loginAction() 中

// make stuff and request
if let j = response.result.value, let firstname = j["firstname"] as? String {
        actInd.stopAnimating()
        var json = JSON(j)
        let user = User(email: email, firstname: firstname)
        let result = json["result"] ?? "0" // if json["result"] doesn't exist it will be equal to "0"
        if result == "1" {
            dispatch_async(dispatch_get_main_queue) { // It is recommended to do UI relative action inside the main thread.
                 self.performSegueWithIdentifier("gotoUserProfile", sender: user) // Here you send your user to be usable in prepareForSegue
            }
        }
} // Do other stuff

并且在你的 LoginVC 中 prepareForSegue

func prepareForSegue(segue: NSStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "gotoUserProfile" {
        let destinationVC = segue.destinationController
        destinationVC.user = sender // So you have to make a User attribute in your UserProfileVC
    }
}

希望对您有所帮助。