Swift 3.0上Facebook登录错误代码2500

Question

我正在尝试将Facebook登录与swift 3.0集成到iOS 10应用程序中。在将FacebookSDK安装到应用程序后，我得到如下所示的错误代码2500:

控制台错误码:

body =     {
    error =         {
        code = 2500;
        "fbtrace_id" = FpAkfsaBAFc;
        message = "An active access token must be used to query information about the current user.";
        type = OAuthException;
    };
};
code = 400;
}})

loginViewController上的loginButton函数:

func loginButton(_ loginButton: FBSDKLoginButton!, didCompleteWith result: FBSDKLoginManagerLoginResult!, error: Error!) {
    fetchProfile()
    print("@@@@Completed Login@@@@")
}

在loginVC上获取Facebook Profile函数:

func fetchProfile() {

    let parameters = ["fields": "email, first_name, last_name, picture.type(large)"]
    FBSDKGraphRequest(graphPath: "me", parameters: parameters).start(completionHandler: { (connection, user, requestError) -> Void in
        if requestError != nil {
            print(requestError)
            print("There are some error during getting the request from fb")
            return
        }
        self.email = (user?["email"] as? String)!
        self.firstName = (user?["first_name"] as? String)!
        self.lastName = (user?["last_name"] as? String)!
        self.nameLabel.text = "(self.firstName) (self.lastName)"
        print("My fbname is " + self.firstName)
        print(self.lastName)
        var pictureUrl = ""
        if let picture = user?["picture"] as? NSDictionary, let data = picture["data"] as? NSDictionary, let url = data["url"] as? String {
            pictureUrl = url
            print(pictureUrl)
        }
    })
}

AppDelegate.swift

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    // Override point for customization after application launch.
    FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions)
    return true
}

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

在堆栈溢出上搜索过类似的问题，但没有在swift 3.0上工作，如果有人能就这个问题提出建议，我会很感激，谢谢，祝你有一个美好的一天!

Answer 1

如错误消息所述，您缺少access_token。在发出请求之前创建一个控件，并检查access_token是否为nil，然后请求一个新的。之后，您应该能够提出您的请求。

Answer 2

我已经解决了这个问题，因为在iOS10中默认禁用了keychain访问，在Capabilities下启用 keychain Sharing和Facebook登录是完美的!