问在初始登录后将用户持久化到Backendless

EN

import UIKit
import FBSDKCoreKit
import FBSDKLoginKit

class ViewController: UIViewController {


let APP_ID = "i have it"
let SECRET_KEY = "i have it"
let VERSION_NUM = "v1"

var backendless = Backendless.sharedInstance()




@IBOutlet weak var userEmail: UITextField!


@IBOutlet weak var password: UITextField!


func displayAlert(title: String, message: String) {

    let alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertControllerStyle.Alert)
    alert.addAction((UIAlertAction(title: "OK", style: .Default, handler: { (action) -> Void in

        self.dismissViewControllerAnimated(true, completion: nil)

    })))

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


}







@IBAction func signUp(sender: AnyObject) {

    let user = BackendlessUser()
    user.email = self.userEmail.text
    user.password = self.password.text


    if userEmail.text == "" || password.text == ""{

        displayAlert("Error in form", message: "Please enter a email adress and password")

    } else{

    backendless.userService.registering(user,
                                        response: { (registeredUser : BackendlessUser!) -> () in
                                            print("User has been registered (ASYNC): \(registeredUser)")
        },
                                        error: { ( fault : Fault!) -> () in
                                            print("Server reported an error: \(fault)")
        } 
    )
    }

}




@IBAction func logIn(sender: AnyObject) {


    if userEmail.text == "" || password.text == ""{

        displayAlert("Error in form", message: "Please enter a email adress and password")

    }else{





 loginUserAsync()


        let appDelegate = UIApplication.sharedApplication().delegate! as! AppDelegate

        var initialViewController = self.storyboard!.instantiateViewControllerWithIdentifier("myTabbarControllerID") as! UIViewController
        appDelegate.window?.rootViewController = initialViewController
        appDelegate.window?.makeKeyAndVisible()



    }
}


func loginUserAsync() {

    let user = BackendlessUser()
    user.email = self.userEmail.text
    user.password = self.password.text

    backendless.userService.login(

        self.userEmail.text, password:self.password.text,

        response: { ( user : BackendlessUser!) -> () in

            self.backendless.userService.setPersistentUser()

            self.backendless.userService.setStayLoggedIn( true )

            self.backendless.userService.getPersistentUser()

            let user = self.backendless.userService.currentUser

            if (user != nil) {

                // get user's email (i.e. mandatory/predefined property)

                let userEmail = user.email
                let password = user.password



                let appDelegate = UIApplication.sharedApplication().delegate! as! AppDelegate

                var initialViewController = self.storyboard!.instantiateViewControllerWithIdentifier("myTabbarControllerID") as! UIViewController
                appDelegate.window?.rootViewController = initialViewController
                appDelegate.window?.makeKeyAndVisible()
            }

            else if (user == nil) {

                print("User hasn't been logged")

            }

        },

        error: { ( fault : Fault!) -> () in

            print("Server reported an error: \(fault)")

        }

    )

}

func validUserTokenAsync() {
    backendless.userService.isValidUserToken(
        { (var result : AnyObject!) -> () in
            print("isValidUserToken (ASYNC): \(result.boolValue)")
        },
        error: { (var fault : Fault!) -> () in
            print("Server reported an error (ASYNC): \(fault)")
        } 
    ) 
}


override func viewDidLoad() {
    super.viewDidLoad()



    let loginButton = FBSDKLoginButton()
    loginButton.center = self.view.center
    self.view.addSubview(loginButton)



}


override func viewDidAppear(animated: Bool) {
    loginUserAsync()
}


override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}









}