應用崩潰時從主視圖控制器到另一個視圖控制器移動，詢問呼叫堆

所示

import UIKit 

class SignUpViewController: UIViewController 
{ 

@IBOutlet weak var usernametext: UITextField! 

@IBOutlet weak var emailtext: UITextField! 

@IBOutlet weak var passwordtext: UITextField! 

@IBOutlet weak var retypepasswordtext: 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.h 
} 

@IBAction func Signupbutton(sender: AnyObject) { 
    let username = usernametext.text ; 
    let useremail = emailtext.text ; 
    let password = passwordtext.text ; 
    let retypepassword = retypepasswordtext.text ; 

    //alert message with confirmation 
    func displayMyAlertMessage(UserMessage :String) 
    { 

     var 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) 

    } 

    //check empty fields 

    if(username.isEmpty || useremail.isEmpty || password.isEmpty || retypepassword.isEmpty) 

    { 
     //display alert message 
     displayMyAlertMessage("all fields are reqiured"); 
     return; 

    } 

    //password match 

    if(password != retypepassword) 
    { 
     //display alert message 

     displayMyAlertMessage("passwords do not match"); 

     return; 
    } 

    //store data 

    NSUserDefaults.standardUserDefaults().setObject(username, forKey: "username") 
    NSUserDefaults.standardUserDefaults().setObject(useremail, forKey: "email") 
    NSUserDefaults.standardUserDefaults().setObject(password, forKey: "password") 
    NSUserDefaults.standardUserDefaults().setObject(retypepassword, forKey: "retypepassword") 
    //alert msg 

    } 

}

錯誤： -應用崩潰時從主視圖控制器到另一個視圖控制器移動，詢問呼叫堆

2015-06-08 13:24:18.163 login excersice[3506:334174] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<login_excersice.SignUpViewController 0x7be6e4e0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key email.' 
*** First throw call stack: 
(
    0 CoreFoundation      0x00293946 __exceptionPreprocess + 182 
    1 libobjc.A.dylib      0x01c6fa97 objc_exception_throw + 44 
    2 CoreFoundation      0x00293561 -[NSException raise] + 17 
    3 Foundation       0x0071a10e -[NSObject(NSKeyValueCoding) setValue:forUndefinedKey:] + 282 
    4 Foundation       0x00676138 _NSSetUsingKeyValueSetter + 115 
    5 Foundation       0x006760bd -[NSObject(NSKeyValueCoding) setValue:forKey:] + 267 
    6 Foundation       0x006ab9a6 -[NSObject(NSKeyValueCoding) setValue:forKeyPath:] + 386 
    7 UIKit        0x00ddc649 -[UIRuntimeOutletConnection connect] + 106 
    8 libobjc.A.dylib      0x01c85724 -[NSObject performSelector:] + 62 
    9 CoreFoundation      0x001cd5dc -[NSArray makeObjectsPerformSelector:] + 316 
    10 UIKit        0x00ddb10a -[UINib instantiateWithOwner:options:] + 1775 
    11 UIKit        0x00bfd624 -[UIViewController _loadViewFromNibNamed:bundle:] + 270 
    12 UIKit        0x00bfddbb -[UIViewController loadView] + 295 
    13 UIKit        0x00bfdfef -[UIViewController loadViewIfRequired] + 78 
    14 UIKit        0x00bfe595 -[UIViewController view] + 35 
    15 UIKit        0x01271707 -[_UIFullscreenPresentationController _setPresentedViewController:] + 75 
    16 UIKit        0x00bd3a81 -[UIPresentationController initWithPresentedViewController:presentingViewController:] + 113 
    17 UIKit        0x00c0ba61 -[UIViewController _presentViewController:withAnimationController:completion:] + 2102 
    18 UIKit        0x00c0e5d2 __62-[UIViewController presentViewController:animated:completion:]_block_invoke + 345 
    19 UIKit        0x00c0e424 -[UIViewController presentViewController:animated:completion:] + 224 
    20 UIKit        0x00c130be -[UIViewController _showViewController:withAction:sender:] + 213 
    21 UIKit        0x00e4f3b5 -[UIStoryboardShowSegue perform] + 143 
    22 UIKit        0x010c3b49 -[UIStoryboardSegueTemplate _perform:] + 217 
    23 UIKit        0x010c3bc5 -[UIStoryboardSegueTemplate perform:] + 116 
    24 libobjc.A.dylib      0x01c857cd -[NSObject performSelector:withObject:withObject:] + 84 
    25 UIKit        0x00aa823d -[UIApplication sendAction:to:from:forEvent:] + 99 
    26 UIKit        0x00aa81cf -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 64 
    27 UIKit        0x00bdbe86 -[UIControl sendAction:to:forEvent:] + 69 
    28 UIKit        0x00bdc2a3 -[UIControl _sendActionsForEvents:withEvent:] + 598 
    29 UIKit        0x00bdb50d -[UIControl touchesEnded:withEvent:] + 660 
    30 UIKit        0x00af860a -[UIWindow _sendTouchesForEvent:] + 874 
    31 UIKit        0x00af90e5 -[UIWindow sendEvent:] + 791 
    32 UIKit        0x00abe549 -[UIApplication sendEvent:] + 242 
    33 UIKit        0x00ace37e _UIApplicationHandleEventFromQueueEvent + 20690 
    34 UIKit        0x00aa2b19 _UIApplicationHandleEventQueue + 2206 
    35 CoreFoundation      0x001b71df __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15 
    36 CoreFoundation      0x001acced __CFRunLoopDoSources0 + 253 
    37 CoreFoundation      0x001ac248 __CFRunLoopRun + 952 
    38 CoreFoundation      0x001abbcb CFRunLoopRunSpecific + 443 
    39 CoreFoundation      0x001ab9fb CFRunLoopRunInMode + 123 
    40 GraphicsServices     0x0402724f GSEventRunModal + 192 
    41 GraphicsServices     0x0402708c GSEventRun + 104 
    42 UIKit        0x00aa68b6 UIApplicationMain + 1526 
    43 login excersice      0x000a748e top_level_code + 78 
    44 login excersice      0x000a74cb main + 43 
    45 libdyld.dylib      0x023dcac9 start + 1 
    46 ???         0x00000001 0x0 + 1 
) 
libc++abi.dylib: terminating with uncaught exception of type NSException 
(lldb)

來源

2015-06-08 AjayPandiyaraj

檢查第二個控制器中的「電子郵件」插座 – sage444