로그 아웃 스위프트에서 앱이 다운 됨

Question

그래서 내 앱에 간단한 로그인 시스템을 만드는 방법에 대한 Belal Khan의 가이드를 따르고있었습니다. 나는 튜토리얼을 따라 그것은 내가 로그 아웃 버튼을

로그인 VC 존재 로그인 VC와 ProfileVC에 대한 코드를 게시 할 예정입니다 로그 아웃하려는 지점까지 아름답게 작동합니다

import UIKit 
import Alamofire 
class ViewController: UIViewController { 

//The login script url make sure to write the ip instead of localhost 
//you can get the ip using ifconfig command in terminal 
let URL_USER_LOGIN = "http://madrasati.site/userReg/v1/login.php" 

//the defaultvalues to store user data 
//the defaultvalues to store user data 
let defaultValues = UserDefaults.standard 

//the connected views 
//don't copy instead connect the views using assistant editor 
@IBOutlet weak var labelMessage: UILabel! 
@IBOutlet weak var textFieldUserName: UITextField! 
@IBOutlet weak var textFieldPassword: UITextField! 

//the button action function 
@IBAction func buttonLogin(_ sender: UIButton) { 

    //getting the username and password 
    let parameters: Parameters=[ 
     "username":textFieldUserName.text!, 
     "password":textFieldPassword.text! 
    ] 

    //making a post request 
    Alamofire.request(URL_USER_LOGIN, method: .post, parameters: parameters).responseJSON 
     { 
      response in 
      //printing response 
      print(response) 

      //getting the json value from the server 
      if let result = response.result.value { 
       let jsonData = result as! NSDictionary 

       //if there is no error 
       if(!(jsonData.value(forKey: "error") as! Bool)){ 

        //getting the user from response 
        let user = jsonData.value(forKey: "user") as! NSDictionary 

        //getting user values 
        let userId = user.value(forKey: "id") as! Int 
        let userName = user.value(forKey: "username") as! String 
        let userEmail = user.value(forKey: "email") as! String 
        let userPhone = user.value(forKey: "phone") as! String 

        //saving user values to defaults 
        self.defaultValues.set(userId, forKey: "userid") 
        self.defaultValues.set(userName, forKey: "username") 
        self.defaultValues.set(userEmail, forKey: "useremail") 
        self.defaultValues.set(userPhone, forKey: "userphone") 

        //switching the screen 
        let profileViewController = self.storyboard?.instantiateViewController(withIdentifier: "ProfileViewController") as! ProfileViewController 
        self.navigationController?.pushViewController(profileViewController, animated: true) 

        self.dismiss(animated: false, completion: nil) 
       }else{ 
        //error message in case of invalid credential 
        self.labelMessage.text = "Invalid username or password" 
       } 
      } 
    } 
} 

override func viewDidLoad() { 
    super.viewDidLoad() 
    //hiding the navigation button 
    let backButton = UIBarButtonItem(title: "", style: UIBarButtonItemStyle.plain, target: navigationController, action: nil) 
    navigationItem.leftBarButtonItem = backButton 

    // Do any additional setup after loading the view, typically from a nib. 

    //if user is already logged in switching to profile screen 
    if defaultValues.string(forKey: "username") != nil{ 
     let profileViewController = self.storyboard?.instantiateViewController(withIdentifier: "ProfileViewcontroller") as! ProfileViewController 
     self.navigationController?.pushViewController(profileViewController, animated: true) 

    } 
} 
} 

ProfileViewController는 :

 
2017-11-30 22:03:33.987292+0400 registerationtest[40711:1152571] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Storyboard() doesn't contain a view controller with identifier 'ViewController'' 
*** First throw call stack: 
(
    0 CoreFoundation      0x0000000105e981ab __exceptionPreprocess + 171 
    1 libobjc.A.dylib      0x000000010552df41 objc_exception_throw + 48 
    2 UIKit        0x0000000106c2b1f3 -[UIStoryboard instantiateInitialViewController] + 0 
    3 registerationtest     0x0000000104a64221 _T017registerationtest21ProfileViewControllerC12buttonLogoutySo8UIButtonCF + 913 
    4 registerationtest     0x0000000104a6482c _T017registerationtest21ProfileViewControllerC12buttonLogoutySo8UIButtonCFTo + 60 
    5 UIKit        0x0000000106315275 -[UIApplication sendAction:to:from:forEvent:] + 83 
    6 UIKit        0x00000001064924a2 -[UIControl sendAction:to:forEvent:] + 67 
    7 UIKit        0x00000001064927bf -[UIControl _sendActionsForEvents:withEvent:] + 450 
    8 UIKit        0x00000001064916ec -[UIControl touchesEnded:withEvent:] + 618 
    9 UIKit        0x000000010638abbb -[UIWindow _sendTouchesForEvent:] + 2807 
    10 UIKit        0x000000010638c2de -[UIWindow sendEvent:] + 4124 
    11 UIKit        0x000000010632fe36 -[UIApplication sendEvent:] + 352 
    12 UIKit        0x0000000106c72434 __dispatchPreprocessedEventFromEventQueue + 2809 
    13 UIKit        0x0000000106c75089 __handleEventQueueInternal + 5957 
    14 CoreFoundation      0x0000000105e3b231 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 
    15 CoreFoundation      0x0000000105edae41 __CFRunLoopDoSource0 + 81 
    16 CoreFoundation      0x0000000105e1fb49 __CFRunLoopDoSources0 + 185 
    17 CoreFoundation      0x0000000105e1f12f __CFRunLoopRun + 1279 
    18 CoreFoundation      0x0000000105e1e9b9 CFRunLoopRunSpecific + 409 
    19 GraphicsServices     0x000000010e1809c6 GSEventRunModal + 62 
    20 UIKit        0x00000001063135e8 UIApplicationMain + 159 
    21 registerationtest     0x0000000104a63827 main + 55 
    22 libdyld.dylib      0x000000010a3bed81 start + 1 
    23 ???         0x0000000000000001 0x0 + 1 
) 
libc++abi.dylib: terminating with uncaught exception of type NSException 
(lldb) 

:

import UIKit 

class ProfileViewController: UIViewController { 

    //label again don't copy instead connect 
    @IBOutlet weak var labelUserName: UILabel! 

    //button 
    @IBAction func buttonLogout(_ sender: UIButton) { 

     //removing values from default 
     UserDefaults.standard.removePersistentDomain(forName: Bundle.main.bundleIdentifier!) 
     UserDefaults.standard.synchronize() 

     //switching to login screen 
     let loginViewController = self.storyboard?.instantiateViewController(withIdentifier: "ViewController") as! ViewController 
     self.navigationController?.pushViewController(loginViewController, animated: true) 
     self.dismiss(animated: false, completion: nil) 
    } 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     //hiding back button 
     let backButton = UIBarButtonItem(title: "", style: UIBarButtonItemStyle.plain, target: navigationController, action: nil) 
     navigationItem.leftBarButtonItem = backButton 

     //getting user data from defaults 
     let defaultValues = UserDefaults.standard 
     if let name = defaultValues.string(forKey: "username"){ 
      //setting the name to label 
      labelUserName.text = name 
     }else{ 
      //send back to login view controller 
     } 

    } 
} 

이 내가지고있어 오류입니다

편집 : 오류가이 라인을 참조한다

 
2017-11-30 22:05:22.424198+0400 registerationtest[40745:1154215] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Storyboard() doesn't contain a view controller with identifier 'ViewController'' 
*** First throw call stack: 
(
    0 CoreFoundation      0x000000010cb6d1ab __exceptionPreprocess + 171 
    1 libobjc.A.dylib      0x000000010c202f41 objc_exception_throw + 48 
    2 UIKit        0x000000010d9001f3 -[UIStoryboard instantiateInitialViewController] + 0 
    3 registerationtest     0x000000010b739221 _T017registerationtest21ProfileViewControllerC12buttonLogoutySo8UIButtonCF + 913 
    4 registerationtest     0x000000010b73982c _T017registerationtest21ProfileViewControllerC12buttonLogoutySo8UIButtonCFTo + 60 
    5 UIKit        0x000000010cfea275 -[UIApplication sendAction:to:from:forEvent:] + 83 
    6 UIKit        0x000000010d1674a2 -[UIControl sendAction:to:forEvent:] + 67 
    7 UIKit        0x000000010d1677bf -[UIControl _sendActionsForEvents:withEvent:] + 450 
    8 UIKit        0x000000010d1666ec -[UIControl touchesEnded:withEvent:] + 618 
    9 UIKit        0x000000010d05fbbb -[UIWindow _sendTouchesForEvent:] + 2807 
    10 UIKit        0x000000010d0612de -[UIWindow sendEvent:] + 4124 
    11 UIKit        0x000000010d004e36 -[UIApplication sendEvent:] + 352 
    12 UIKit        0x000000010d947434 __dispatchPreprocessedEventFromEventQueue + 2809 
    13 UIKit        0x000000010d94a089 __handleEventQueueInternal + 5957 
    14 CoreFoundation      0x000000010cb10231 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 
    15 CoreFoundation      0x000000010cbafe41 __CFRunLoopDoSource0 + 81 
    16 CoreFoundation      0x000000010caf4b49 __CFRunLoopDoSources0 + 185 
    17 CoreFoundation      0x000000010caf412f __CFRunLoopRun + 1279 
    18 CoreFoundation      0x000000010caf39b9 CFRunLoopRunSpecific + 409 
    19 GraphicsServices     0x0000000114dca9c6 GSEventRunModal + 62 
    20 UIKit        0x000000010cfe85e8 UIApplicationMain + 159 
    21 registerationtest     0x000000010b738827 main + 55 
    22 libdyld.dylib      0x0000000111001d81 start + 1 
    23 ???         0x0000000000000001 0x0 + 1 
) 
libc++abi.dylib: terminating with uncaught exception of type NSException 
(lldb) 

Answer 1

가 : 스토리 보드 ID를 할당 한 후, 난 여전히 오류를 받고 있어요

let loginViewController = self.storyboard?.instantiateViewController(withIdentifier: "ViewController") as! ViewController 

그것은 당신을 말하고 당신의 천국 ' 스토리 보드의 UIViewController에 식별자 "ViewController"를 할당했습니다. 스토리 보드로 이동하여 UIViewController를 클릭하고 오른쪽 패널의 ID Inspector를 클릭하고 "ViewController"로 스토리 보드 ID 필드를 채 웁니다.