Facebook登錄后觸發segue

Question

我正在使用Facebook登錄名來開發我的第一個應用程序，並且登錄后無法觸發segue。facebook登錄名會觸發就好，然后登錄我，然后將其轉儲回登錄VC 。

這是我觸發segue的地方：

func loginButtonDidCompleteLogin(_ loginButton: LoginButton, result: LoginResult) {

    switch result {
    case .failed(let error):
        print(error)
        break

    case .success(_,_,_):
        print("login succeeded!")
        self.performSegue(withIdentifier: "SearchVC", sender: self.user)

    case .cancelled:
        print("Canceled!")
    }
}

這是我的其他FB登錄方法：

func facebookButtonClicked(sender: UIButton) {

    let loginManager = LoginManager()

    loginManager.logIn(readPermissions: [.publicProfile], viewController: self) { loginResult in

        switch loginResult {
        case .failed(let error):
            print(error)

        case .cancelled:
            print("User cancelled login")

        case .success(let grantedPermissions, let declinedPermissions, let accessToken):
            print("Logged in")
            self.getFBUserData()
        }
    }
}

func getFBUserData() {

    if FBSDKAccessToken.current() != nil {

        FBSDKGraphRequest(graphPath: "me", parameters: ["fields": "id, name, email"]).start(completionHandler: { (connection, result, error) -> Void in

            if error == nil {
                self.userData = result as! [String : AnyObject]
                print(result!)
                print(self.userData)
            }
        })
    }
}

我的Segue：

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

    if segue.identifier == "SearchVC", let searchVC = segue.destination as? SearchVC { 
        searchVC.user = sender as? User ?? User()
    }
}

在我的應用程序委托中：

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

func applicationWillResignActive(_ application: UIApplication) {
    FBSDKAppEvents.activateApp()
}

func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey: Any] = [:]) -> Bool {
    return SDKApplicationDelegate.shared.application(app, open: url, options: options)
}

func applicationDidBecomeActive(application: UIApplication) {
    // Call the 'activate' method to log an app event for use
    // in FB analytics and advertising reporting.
    AppEventsLogger.activate(application)
    // ...
}

該segue在IB中以標識符“ SearchVC”連接

編輯：我最初嘗試在FBSDKGraphRequest的完成塊中執行segue，但它也不會觸發

我不是在問如何執行segue，因為建議的重復問題表明

Answer 1

您應該在FBSDKGraphRequest完成中調用performSegue方法。

  func getFBUserData(){
    if((FBSDKAccessToken.current()) != nil){
      FBSDKGraphRequest(graphPath: "me", parameters: ["fields": "id, name, email"]).start(completionHandler: { (connection, result, error) -> Void in
        if (error == nil){
          self.userData = result as! [String : AnyObject]
          print(result!)
          print(self.userData)
          self.performSegue(withIdentifier: "SearchVC", sender: self)
        }
      })
    }
  }
}

Answer 2

該項目已被竊聽。 我還有另一個問題，就是沒有在這里和那里執行代碼以及其他一些雜項塊。 刪除我的LoginVC文件並重新創建它可以解決所有問題