Receiver没有标识符错误消息

我正在使用xcode 7 beta和swift 2.0。 我正在学习一个教程（youtube.com/watch?v=PKOswUE731c）。

总之，我有一个故事情节3观点; 一个受保护的vc，一个loginvc和RegisterViewController。 我已经设置了2个赛段

segue modal with protected_vc < – >用loginView标识的login_vc

在login_vc < – >使用registerView标识的RegisterViewController上button上的segue模式

当我loginvc上的注册button时，我遇到了一个问题。 如果我点击注册button它崩溃的应用程序，我得到的消息'Receiver (<registerLogin.RegisterViewController: 0x7f97235f6140>) has no segue with identifier 'loginView''

现在我注意到在教程select一个segue给出了另一个下拉，在我的情况下，我只看到推 – 模式 – popover – replace和自定义。 这可能是原因吗？

或者这部分ViewController

  override func viewDidAppear(animated: Bool) { self.performSegueWithIdentifier("loginView", sender: self); } 

RegisterViewController的完整代码是

 import UIKit class RegisterViewController: ViewController { @IBOutlet weak var userEmailTextField: UITextField! @IBOutlet weak var userPasswordTextField: UITextField! @IBOutlet weak var repeatPasswordTextField: UITextField! override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view. } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } @IBAction func registerButtonTapped(sender: AnyObject) { let userEmail = userEmailTextField.text let userPassword = userPasswordTextField.text let repeatPassword = repeatPasswordTextField.text //No empty fields if((userEmail!.isEmpty || userPassword!.isEmpty || repeatPassword!.isEmpty)){ //Display alert message displayMyAlertMessage("All fields required") return } //Check if passwords match if(userPassword != repeatPassword){ //Display alert message displayMyAlertMessage("Passwords mistakes") return } //Store data NSUserDefaults.standardUserDefaults().setObject(userEmail, forKey: "userEmail") NSUserDefaults.standardUserDefaults().setObject(userPassword, forKey: "userPassword") NSUserDefaults.standardUserDefaults().synchronize() //Display alert message with confirmation let myAlert = UIAlertController(title: "Alert", message: "Registration successful", preferredStyle: UIAlertControllerStyle.Alert) let okAction = UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default) { action in self.dismissViewControllerAnimated(true, completion: nil) } } func displayMyAlertMessage(userMessage:String){ let myAlert = UIAlertController(title: "Alert", message: userMessage, preferredStyle: UIAlertControllerStyle.Alert) let okAction = UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default, handler: nil) myAlert.addAction(okAction) self.presentViewController(myAlert, animated: true, completion: nil) } } 

和完整的错误信息（手动包装第一行）：

 2015-10-11 07:17:57.378 registerLogin[667:10462] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Receiver (<registerLogin.RegisterViewController: 0x7fb7f978d4c0>) has no segue with identifier 'loginView'' *** First throw call stack: ( 0 CoreFoundation 0x0000000102d249b5 __exceptionPreprocess + 165 1 libobjc.A.dylib 0x0000000104923deb objc_exception_throw + 48 2 UIKit 0x00000001036caba3 -[UIViewController shouldPerformSegueWithIdentifier:sender:] + 0 3 registerLogin 0x0000000102b4260f _TFC13registerLogin14ViewController13viewDidAppearfS0_FSbT_ + 127 4 registerLogin 0x0000000102b42661 _TToFC13registerLogin14ViewController13viewDidAppearfS0_FSbT_ + 49 5 UIKit 0x00000001036cd82e -[UIViewController _setViewAppearState:isAnimating:] + 830 6 UIKit 0x00000001036ce1b0 -[UIViewController _endAppearanceTransition:] + 262 7 UIKit 0x000000010369950e -[UIPresentationController transitionDidFinish:] + 827 8 UIKit 0x0000000103857c17 -[_UICurrentContextPresentationController transitionDidFinish:] + 42 9 UIKit 0x000000010369c97e __56-[UIPresentationController runTransitionForCurrentState]_block_invoke_2 + 183 10 UIKit 0x0000000103eb105c -[_UIViewControllerTransitionContext completeTransition:] + 101 11 UIKit 0x00000001036963fb -[UITransitionView notifyDidCompleteTransition:] + 252 12 UIKit 0x000000010369610c -[UITransitionView _didCompleteTransition:] + 1344 13 UIKit 0x0000000103698878 -[UITransitionView _transitionDidStop:finished:] + 104 14 UIKit 0x00000001035c3a63 -[UIViewAnimationState sendDelegateAnimationDidStop:finished:] + 241 15 UIKit 0x00000001035c3e12 -[UIViewAnimationState animationDidStop:finished:] + 80 16 QuartzCore 0x000000010799bd70 _ZN2CA5Layer23run_animation_callbacksEPv + 308 17 libdispatch.dylib 0x000000010540d4bb _dispatch_client_callout + 8 18 libdispatch.dylib 0x00000001053f53ff _dispatch_main_queue_callback_4CF + 1738 19 CoreFoundation 0x0000000102c84e69 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9 20 CoreFoundation 0x0000000102c463b9 __CFRunLoopRun + 2073 21 CoreFoundation 0x0000000102c45918 CFRunLoopRunSpecific + 488 22 GraphicsServices 0x000000010722dad2 GSEventRunModal + 161 23 UIKit 0x000000010354199e UIApplicationMain + 171 24 registerLogin 0x0000000102b4323d main + 109 25 libdyld.dylib 0x000000010544292d start + 1 ) libc++abi.dylib: terminating with uncaught exception of type NSException 

我已经设置了赛段

并从注册button

在项目中find的术语loginView只给出2个search结果看图像，所以我不明白RegisterViewController“认为”它需要loginView

Answer 1

你的类RegisterViewController是ViewController的子类，但可能应该是UIViewController的子类。 可能您的ViewController类是创build新项目时已经创build的主视图控制器。

当RegisterViewController是ViewController的子类时，它也inheritance了viewDidAppear方法。 因此，当它出现它调用performSegue...与loginView ，但现在与RegisterViewController的实例没有loginView 。 因此例外。

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下面的原始答案，这是一种例外的可能原因是has no segue with identifier '...name...' ：

可能您的segue标识符没有设置或拼写错误。

1. 点击继续
2. 确保右侧的“实用程序”面板可见
3. 确保“属性”检查器可见
4. 检查“Storyboard Segue”下的“Identifier”的值（在屏幕截图中为“infoSegue”）