斯威夫特&解析 - PFUser currentUser永远不等于零 [英] Swift & Parse - PFUser currentUser never equals nil

问题描述

我正在使用Xcode，Swift和Parse。当我尝试注销PFUser时，我永远不会得到零回报。

I am using Xcode, Swift, and Parse. When I try and logout a PFUser, i never get a return of nil.

在应用程序的这一部分中，viewController只显示一个登录的按钮。一个用户发送注册。一个发送用户更改详细信息，一个是简单的注销。

In this part of the app, the viewController is simply showing a few buttons one logs in. One sends the user to signup. One sends the user to change details, and one is a simple logout.

注销时两个重要的代码是;

The code for the two that matter on logout is;

@IBAction func logout(sender: AnyObject) {

    PFUser.logOut()
    var currentUser = PFUser.currentUser()

    self.displayAlert("You are now logged out", error: "")

    println(currentUser!)
}

@IBAction func changeDetails(sender: AnyObject) {

    var currentUser = PFUser.currentUser()

    println(currentUser!)

        if currentUser != nil {

            let nextView30 = self.storyboard?.instantiateViewControllerWithIdentifier("changeDetails") as! changeUserDetailsViewController

           self.navigationController?.pushViewController(nextView30, animated: true)

    } else {

        self.displayAlert("Please log in", error: "")

    }

}

一旦代码运行并且我注销，无论currentUser被读取到哪里，我都得到以下类型的响应，而不是nil。下一个ViewController被操作，如果没有usr登录就不会发生这种情况。

Once the code runs and I logout, wherever the currentUser gets read I get the following type of response, not nil. The next ViewController is actioned, and this shouldn't happen without a usr logged in.

PFUser：0x37018fbc0，objectId：new，localId：local_3b5eb7453f9af5ed {
}

PFUser: 0x37018fbc0, objectId: new, localId: local_3b5eb7453f9af5ed { }

我做错了什么还是这个标准？
如果它是正确的，我如何返回没有用户登录？

Am I doing something wrong or is this standard? If it is correct, how do I return no user logged in?

谢谢

推荐答案

我一直在努力退出一段时间，我相信我终于破解了它！

I've been struggling with logging out for a little while and I believe I have finally cracked it!

无论我做了什么，当我使用PFUser.logOut（）时，永远不会将PFUser.currentUser（）设置为nil，但它会将PFUser.currentUser（）！。username设置为nil ...

No matter what I did, when I used "PFUser.logOut()" would never set "PFUser.currentUser()" to nil, but it would set "PFUser.currentUser()!.username" to nil...

因此我使用了

var currentUser = PFUser.currentUser()!.username

作为跟踪的全局变量是用户已登录。

as a global variable to track is a user is logged in.

在我的登录/首页上我添加了

On my login/first page I added

override func viewDidAppear(animated: Bool) {

    if currentUser != nil {

        self.performSegueWithIdentifier("login", sender: self)

    }

}

最后在我使用的退出按钮上

and finally on my logout button i used

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {

    if segue.identifier == "logout" {

        PFUser.logOut() //Log user out

        currentUser = PFUser.currentUser()!.username //Reset currentUser variable to nil

    }

}

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