iOS/Facebook Ошибка входа: этот класс не является ключевым значением, совместимым с кодировкой для ключа

Question

Я просто пытаюсь создать страницу входа в систему Facebook для своего приложения iOS, но она продолжает ломаться, когда IBOutlet в моем LoginViewController пытается подключиться к UIActivityIndicatorView. Здесь ошибка, что я получаю:

2013-12-10 00:29:11.062 uConnect[2254:70b] * Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[ setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key loader.'

Вот мой интерфейс

@interface UConnectLoginViewController : UIViewController 
-(void)loginFailed; 
@property (strong, nonatomic) IBOutlet UIActivityIndicatorView* loader; 
@end 

вот моя реализация

@interface UConnectLoginViewController() 
-(IBAction)performLogin:(id)sender; 


@end 

@implementation UConnectLoginViewController 
@synthesize loader; 

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil 
{ 
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; 
    if (self) { 
     // Custom initialization 
    } 
    return self; 
} 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view from its nib. 
} 

- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 

-(IBAction)performLogin:(id)sender 
{ 
    [self.loader startAnimating]; 
    UConnectAppDelegate* appDelegate = [UIApplication sharedApplication].delegate; 
    [appDelegate openSession]; 
} 

-(void)loginFailed 
{ 
    [self.loader stopAnimating]; 
} 
@end 

В файле XIb я уже подключил выход к мнению ,

EDIT:

Here is the full console error log: 
2013-12-10 18:02:13.830 uConnect[3596:70b] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UConnectLoginViewController 0x8a8c4a0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key spinner.' 
*** First throw call stack: 
(
    0 CoreFoundation      0x017b85e4 __exceptionPreprocess + 180 
    1 libobjc.A.dylib      0x0153b8b6 objc_exception_throw + 44 
    2 CoreFoundation      0x018486a1 -[NSException raise] + 17 
    3 Foundation       0x011fc9ee -[NSObject(NSKeyValueCoding) setValue:forUndefinedKey:] + 282 
    4 Foundation       0x01168cfb _NSSetUsingKeyValueSetter + 88 
    5 Foundation       0x01168253 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 267 
    6 Foundation       0x011ca70a -[NSObject(NSKeyValueCoding) setValue:forKeyPath:] + 412 
    7 UIKit        0x0054ba15 -[UIRuntimeOutletConnection connect] + 106 
    8 libobjc.A.dylib      0x0154d7d2 -[NSObject performSelector:] + 62 
    9 CoreFoundation      0x017b3b6a -[NSArray makeObjectsPerformSelector:] + 314 
    10 UIKit        0x0054a56e -[UINib instantiateWithOwner:options:] + 1417 
    11 UIKit        0x003bc605 -[UIViewController _loadViewFromNibNamed:bundle:] + 280 
    12 UIKit        0x003bcdad -[UIViewController loadView] + 302 
    13 UIKit        0x003bd0ae -[UIViewController loadViewIfRequired] + 78 
    14 UIKit        0x003bd5b4 -[UIViewController view] + 35 
    15 UIKit        0x003ccab9 -[UIViewController shouldAutorotate] + 36 
    16 UIKit        0x003cce01 -[UIViewController _preferredInterfaceOrientationForPresentationInWindow:fromInterfaceOrientation:] + 297 
    17 UIKit        0x006515e5 -[UIWindowController transition:fromViewController:toViewController:target:didEndSelector:animation:] + 2330 
    18 UIKit        0x003c90fc -[UIViewController presentViewController:withTransition:completion:] + 6433 
    19 UIKit        0x003c961f -[UIViewController presentViewController:animated:completion:] + 130 
    20 uConnect       0x00002c7a -[UConnectAppDelegate showLoginView] + 218 
    21 uConnect       0x000029b7 -[UConnectAppDelegate application:didFinishLaunchingWithOptions:] + 647 
    22 UIKit        0x002a3355 -[UIApplication _handleDelegateCallbacksWithOptions:isSuspended:restoreState:] + 309 
    23 UIKit        0x002a3b95 -[UIApplication _callInitializationDelegatesForURL:payload:suspended:] + 1536 
    24 UIKit        0x002a83a8 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 824 
    25 UIKit        0x002bc87c -[UIApplication handleEvent:withNewEvent:] + 3447 
    26 UIKit        0x002bcde9 -[UIApplication sendEvent:] + 85 
    27 UIKit        0x002aa025 _UIApplicationHandleEvent + 736 
    28 GraphicsServices     0x0375f2f6 _PurpleEventCallback + 776 
    29 GraphicsServices     0x0375ee01 PurpleEventCallback + 46 
    30 CoreFoundation      0x01733d65 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 53 
    31 CoreFoundation      0x01733a9b __CFRunLoopDoSource1 + 523 
    32 CoreFoundation      0x0175e77c __CFRunLoopRun + 2156 
    33 CoreFoundation      0x0175dac3 CFRunLoopRunSpecific + 467 
    34 CoreFoundation      0x0175d8db CFRunLoopRunInMode + 123 
    35 UIKit        0x002a7add -[UIApplication _run] + 840 
    36 UIKit        0x002a9d3b UIApplicationMain + 1225 
    37 uConnect       0x000026fd main + 141 
    38 libdyld.dylib      0x01df670d start + 1 
) 
libc++abi.dylib: terminating with uncaught exception of type NSException 

приложение код делегат упомянул в выводе:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
{ 
    // Override point for customization after application launch. WE CHECK IF THEY ARE ALREADY LOGGED IN OR NOT. 
    self.mainViewController = [[UIStoryboard storyboardWithName:@"Main" bundle:nil] instantiateViewControllerWithIdentifier:@"UconnectViewController"]; 
    self.navigationController = [[UINavigationController alloc] 
           initWithRootViewController:self.mainViewController]; 
    self.window.rootViewController = self.navigationController; 
    [self.window makeKeyAndVisible]; 
    if (FBSession.activeSession.state == FBSessionStateCreatedTokenLoaded) { 
     // Open the session 
     [self openSession]; 
    } else { 
     //Display login view 
     [self showLoginView]; 
    } 
    return YES; 
} 

Вот другая функция.

-(void)showLoginView 
{ 
    UIViewController *topViewController = [self.navigationController topViewController]; 
    UIViewController *presentedViewController = [topViewController presentedViewController]; 

    //-If login screen is not displayed display it. 
    //-If the login screen is displayed and we come back here then login failure. 
    //-Update UI if the second happens 
    if (![presentedViewController isKindOfClass:[UConnectLoginViewController class]]) { 
     UConnectLoginViewController* login = [[UConnectLoginViewController alloc] initWithNibName:@"UConnectLoginViewController" bundle:nil]; 
     [topViewController presentViewController:login animated:NO completion:nil]; 
    } else { 
     UConnectLoginViewController* login = (UConnectLoginViewController*) presentedViewController; 
     [login loginFailed]; 
    } 
} 

Answer 1

OK, Может быть, проблема в том, что вы забыли поставить "типы URL" в вашем Info.plist

• Откройте ваш Info.plist
• Добавить ключ (взять его из выпадающего списка типов URL)
• Это добавит массив элемента типа 1 словаря
• Выберите «URL схема» массив из выпадающего словаря
• Это добавит «URL S chemes»массив
• добавить строку, содержащую„Fb {YourFBAppId}“в„URL схемы“массив

Я надеюсь, что это поможет you4