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我試圖讓用戶即使關閉應用程序也能保持登錄狀態。我似乎無法讓我的功能正常工作。我有一個函數可以記錄用戶進入，當按鈕被按下時它就起作用，但我似乎無法在正確的地方調用該函數，以便僅在用戶第一次登錄後才加載該函數，然後關閉該應用程序，但不註銷。這裏是我的視圖控制器代碼：初次登錄Backendless後堅持用戶
ViewControler
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.
}
}
您可以在用戶默認值中存儲令牌或布爾值。然後，當這個人回到應用程序時，看看你是否有這個保存的值，並繞過登錄過程。這對你有用嗎？ – ryantxr
我不知道該怎麼做。我對Backendless非常陌生。你能給我一個代碼示例嗎？ –
我以前的解決方案突然停止工作:( –