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私は、アプリ用のシンプルなログインシステムの作成方法に関するBelal Khanのチュートリアルに従っていました。 私はチュートリアルの後、それは私がログアウトボタンがログアウトスウィフトでアプリがクラッシュする
ログインVCが存在するログインVCとProfileVCためのコードを下に掲載します をログアウトしたいポイントまで美しく動作します：
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)
}
}
}
ProfileViewControllerは：
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
}
}
}
これは私が取得していますエラーです
EDIT： ストーリーボードのIDを割り当てた後、私はまだエラーを取得しています：
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)
私はそれに気付かなかったが、同じストーリーボードで2 viewControllersがあります今、私はそれがID与えてくれた、それはまだ私にエラー – SwiftyDude
を与えていますか？ – creeperspeak
nvmとても感謝しています。問題は私のXcodeが盗まれていて、それが正しく構築されていないということでした。どうもありがとう！ – SwiftyDude