视图控制器的条件加载卡住在初始ViewController

问题描述：

我想保存用户的会话与NSUserDefaults，如果用户登录，我会将NSUserDefaults设置为true，反之亦然。但是，即使输入了正确的凭证，我的用户也永远停留在登录页面上。我该如何解决它？视图控制器的条件加载卡住在初始ViewController

LoginViewController代码

func handlingAuthentication(notification: NSNotification) { 

    let dict = notification.object as! NSDictionary 
    let errorFound = dict["error"] 
    let errorMessage = dict["message"] 
    print(errorFound) 

    if(errorFound){ 
     //initialize Alert Controller 
     let alertController = UIAlertController(title: "Authentication error", message: errorMessage?.string, preferredStyle: .Alert) 

     //Initialize Actions 
     let okAction = UIAlertAction(title: "Ok", style: .Default){ 
       (action) -> Void in 
       self.dismissViewControllerAnimated(true, completion: nil) 
      } 

     //Add Actions 
     alertController.addAction(okAction) 

     //Present Alert Controller 
     self.presentViewController(alertController, animated: true, completion: nil) 

    } 
    else 
    { 
     NSUserDefaults.standardUserDefaults().setBool(true, forKey: "isUserLoggedIn") 

     NSUserDefaults.standardUserDefaults().synchronize() 

     self.dismissViewControllerAnimated(true, completion:nil) 

    } 

}

这是我调用该方法handlingAuthentication在LoginViewController

@IBAction func loginBtn(sender: AnyObject) { 
let loginobj = Login(userName : self.usernameField.text!, passWord : self.pwdField.text!) 
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(LoginViewController.handlingAuthentication(_:)), name:"errorPresent", object: nil) 
loginobj.getRequest() 
}

HomeViewController代码

override func viewDidAppear(animated: Bool) { 
    let isUserLoggedIn = NSUserDefaults.standardUserDefaults().boolForKey("IsUserLoggedIn") 
    if(!isUserLoggedIn){ 
     self.performSegueWithIdentifier("toLoginVC", sender: self) 
    } 
} 

@IBAction func logoutBtn(sender: AnyObject) { 
    NSUserDefaults.standardUserDefaults().setBool(false, forKey: "isUserLoggedIn") 
    NSUserDefaults.standardUserDefaults().synchronize() 
}

handlingAuthentication如何调用此方法 –

嗨@PKT我在我的LoginViewController中调用了我的方法（更新了我的帖子以显示此内容） – noobdev

请给出它卡住的行 –

答

您正在使用不同的密钥：

既然你存储的关键“isUserLoggedIn”

NSUserDefaults.standardUserDefaults().setBool(true, forKey: "isUserLoggedIn")

isUserLoggedIn将永远是假的，因为你得到一个不同的密钥“IsUserLoggedIn”

let isUserLoggedIn = NSUserDefaults.standardUserDefaults().boolForKey("IsUserLoggedIn")

视图控制器的条件加载卡住在初始ViewController

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