xcode 收到错误：错误域=com.facebook.sdk.core 代码=8“（空）”

Error recieved: Error Domain=com.facebook.sdk.core Code=8 "(null)"

提问by EI-01

Hello so i keep getting this error:

您好，所以我不断收到此错误：

Error recieved: Error Domain=com.facebook.sdk.core Code=8 "(null)" 

My project works fine when i programmed using xcode 8 and swift 3. But now i downgraded to use xcode 7.3.1 and swift 2.3 and i get this error.

当我使用 xcode 8 和 swift 3 进行编程时，我的项目工作正常。但现在我降级为使用 xcode 7.3.1 和 swift 2.3，但出现此错误。

Below is my appdelegate file:

下面是我的 appdelegate 文件：

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject : AnyObject]?) -> Bool {

        let viewController = ViewController(nibName: nil, bundle: nil)
        viewController.view.backgroundColor = UIColor.whiteColor()
        let navController:UINavigationController = UINavigationController(rootViewController: viewController)

        self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
        self.window?.backgroundColor = UIColor.darkGrayColor()
        self.window?.rootViewController = navController
        self.window!.makeKeyAndVisible()

        //facebook
        FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions)

        //Google
        var error: NSError?
        GGLContext.sharedInstance().configureWithError(&error)
        assert(error == nil, "Error Configuring google services \(error)")
        GIDSignIn.sharedInstance().delegate = self

        return true
    }

 func application(app: UIApplication, openURL url: NSURL, options: [String : AnyObject]) -> Bool {
        return GIDSignIn.sharedInstance().handleURL(url, sourceApplication: options[UIApplicationOpenURLOptionsSourceApplicationKey] as! String, annotation: options[UIApplicationOpenURLOptionsAnnotationKey])
    }

    func application(application: UIApplication, openURL url: NSURL, sourceApplication: String?, annotation: AnyObject) -> Bool {
        return  FBSDKApplicationDelegate.sharedInstance().application(application, openURL: url, sourceApplication: sourceApplication, annotation: annotation)
    }

    func signIn(signIn: GIDSignIn!, didSignInForUser user: GIDGoogleUser!, withError error: NSError!) {

        if error != nil {
            print ("Error sigining in: \(error.localizedDescription)")
            return
        }
    } 

SignInController.swift file:

SignInController.swift 文件：

class SignInController: UIViewController, FBSDKLoginButtonDelegate, GIDSignInUIDelegate, GIDSignInDelegate {
    //starts here
    let fbButton:FBSDKLoginButton = {
        let button = FBSDKLoginButton()
        button.readPermissions = ["public_profile", "email", "user_friends"]
        return button
    }()

    override func viewDidLoad() {
        super.viewDidLoad()

        self.title = "Sign In"
        self.view.backgroundColor = UIColor.whiteColor()

        if FBSDKAccessToken.currentAccessToken() == nil {
            print("I got token: \(FBSDKAccessToken.currentAccessToken()?.tokenString)")
            view.addSubview(fbButton)
            fbButton.center = view.center
            fbButton.delegate = self
            self.fetchprofile()
        }

        else {
            print("Dont have token")
            self.view.addSubview(fbButton)
            fbButton.center = self.view.center
            fbButton.delegate = self
            }

        GIDSignIn.sharedInstance().uiDelegate = self
        GIDSignIn.sharedInstance().delegate = self
        let googleButton = GIDSignInButton(frame: CGRect(x: 30, y: 150, width: 100, height: 50))
        view.addSubview(googleButton)
    }

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

    func loginButton(loginButton: FBSDKLoginButton!, didCompleteWithResult result: FBSDKLoginManagerLoginResult!, error: NSError!) {
        if error != nil {
            print(error.localizedDescription)
            return
        }
        print("I'm in")
        fetchprofile()
    }

    func fetchprofile() {

        print("Getting profile")
        print("FB version: \(FBSDKSettings.sdkVersion())")
        print("Tokensssss:  \(FBSDKAccessToken.currentAccessToken()?.tokenString)")

        let parameters = ["fields": "email"]

        let graphRequest:FBSDKGraphRequest = FBSDKGraphRequest(graphPath: "me", parameters: parameters, HTTPMethod: "GET")

        graphRequest.startWithCompletionHandler { (connection, result, error) -> Void in

            if error != nil {
                print("Error recieved: \(error.debugDescription)")
                return
            }

            guard let email = result["email"] as? String else {
                return
            }

            print("Email: \(email)")
        }
    }

    func loginButtonWillLogin(loginButton: FBSDKLoginButton!) -> Bool {
        return true
    }

    func loginButtonDidLogOut(loginButton: FBSDKLoginButton!) {
        print("Logged out")
    }




    override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
        self.view.endEditing(true)
    }

}

Error receiving:

接收错误：

Error recieved: Error Domain=com.facebook.sdk.core Code=8 "(null)" UserInfo={com.facebook.sdk:FBSDKGraphRequestErrorCategoryKey=0, com.facebook.sdk:FBSDKGraphRequestErrorHTTPStatusCodeKey=400, com.facebook.sdk:FBSDKErrorDeveloperMessageKey=An active access token must be used to query information about the current user., com.facebook.sdk:FBSDKGraphRequestErrorGraphErrorCode=2500, com.facebook.sdk:FBSDKGraphRequestErrorParsedJSONResponseKey={
    body =     {
        error =         {
            code = 2500;
            "fbtrace_id" = CgykKyskOcd;
            message = "An active access token must be used to query information about the current user.";
            type = OAuthException;
        };
    };
    code = 400;
}}

Please could someone assist. Thanks

请有人帮忙。谢谢

Here is my info-plist file:

这是我的 info-plist 文件：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>CFBundleDevelopmentRegion</key>
    <string>en</string>
    <key>CFBundleExecutable</key>
    <string>$(EXECUTABLE_NAME)</string>
    <key>CFBundleIdentifier</key>
    <string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
    <key>CFBundleInfoDictionaryVersion</key>
    <string>6.0</string>
    <key>CFBundleName</key>
    <string>$(PRODUCT_NAME)</string>
    <key>CFBundlePackageType</key>
    <string>APPL</string>
    <key>CFBundleShortVersionString</key>
    <string>1.0</string>
    <key>CFBundleURLTypes</key>
    <array>
        <dict>
            <key>CFBundleURLSchemes</key>
            <array>
                <string>fb{{myFB-Id}}</string>
            </array>
        </dict>
        <dict>
            <key>CFBundleTypeRole</key>
            <string>Editor</string>
            <key>CFBundleURLSchemes</key>
            <array>
                <string>com.googleusercontent.apps.99471515633-84bp5qjrl8jqf0drm10aucsrrepgta12</string>
            </array>
        </dict>
        <dict>
            <key>CFBundleTypeRole</key>
            <string>Editor</string>
            <key>CFBundleURLSchemes</key>
            <array>
                <string>{{Bundler-id}}</string>
            </array>
        </dict>
    </array>
    <key>CFBundleVersion</key>
    <string>1</string>
    <key>LSApplicationCategoryType</key>
    <string></string>
    <key>FacebookAppID</key>
    <string>{{myFB-id}}</string>
    <key>FacebookDisplayName</key>
    <string>{{myFB-displayName}}</string>
    <key>LSApplicationQueriesSchemes</key>
    <array>
        <string>fbapi</string>
        <string>fb-messenger-api</string>
        <string>fbauth2</string>
        <string>fbshareextension</string>
    </array>
    <key>LSRequiresIPhoneOS</key>
    <true/>
    <key>UILaunchStoryboardName</key>
    <string>LaunchScreen</string>
    <key>UIMainStoryboardFile</key>
    <string>Main</string>
    <key>UIRequiredDeviceCapabilities</key>
    <array>
        <string>armv7</string>
    </array>
    <key>UISupportedInterfaceOrientations</key>
    <array>
        <string>UIInterfaceOrientationPortrait</string>
        <string>UIInterfaceOrientationLandscapeLeft</string>
        <string>UIInterfaceOrientationLandscapeRight</string>
    </array>
    <key>UISupportedInterfaceOrientations~ipad</key>
    <array>
        <string>UIInterfaceOrientationPortrait</string>
        <string>UIInterfaceOrientationPortraitUpsideDown</string>
        <string>UIInterfaceOrientationLandscapeLeft</string>
        <string>UIInterfaceOrientationLandscapeRight</string>
    </array>
</dict>
</plist>

回答by Himanshu Moradiya

Updateyour .plistfile https://gist.github.com/himanshu-benzatine/1ad78c7d17051c36f60b934b64725f31

更新您的 . plist文件https://gist.github.com/himanshu-benzatine/1ad78c7d17051c36f60b934b64725f31

// put this code in your button click method

// 将此代码放在您的按钮单击方法中

if FBSDKAccessToken.currentAccessToken() != nil {
        FBSDKLoginManager().logOut()
        return
}

let login:FBSDKLoginManager = FBSDKLoginManager()

login.logInWithReadPermissions(["public_profile", "email", "user_friends" ], handler: { (result:FBSDKLoginManagerLoginResult!, error:NSError!) -> Void in
        if(error != nil){
            FBSDKLoginManager().logOut()
        }else if(result.isCancelled){
            FBSDKLoginManager().logOut()
        }else{
            //Handle login success
            self.returnUserData()
        }
    })




func loginButtonDidLogOut(loginButton: FBSDKLoginButton!) {
        print("User Logged Out")

}

func returnUserData()
{
    let graphRequest : FBSDKGraphRequest = FBSDKGraphRequest(graphPath: "me", parameters: ["fields": "id, name, first_name, last_name, email, friends, birthday, cover, devices, picture.type(large)"])

    graphRequest.startWithCompletionHandler({ (connection, result, error) -> Void in
    if ((error) != nil)
    {
          // Process error
          print("Error: \(error)")
    }
    else
    {
          print(result)

    }
   })
}

// Add this code in your AppDelegate.swift file

//将此代码添加到您的 AppDelegate.swift 文件中

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
  return FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions)
}



func application(application: UIApplication, openURL url: NSURL, sourceApplication: String?, annotation: AnyObject) -> Bool {
        return FBSDKApplicationDelegate.sharedInstance().application(application, openURL: url, sourceApplication:  sourceApplication, annotation: annotation)
}