Swift錯誤 - 「無法識別的選擇器發送到實例」

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我正在Xcode v6.1.1中的Swift項目上工作，並且出現以下我不明白的錯誤。我相信我的Main.storyboard中的幾個標籤和/或我連接到的UILabel變量存在問題。我已經嘗試了所有我能找到的解決方法，並沒有任何工作。Swift錯誤 - 「無法識別的選擇器發送到實例」

任何幫助，將不勝感激。

2015-03-02 19:43:14.854 Final Project[7380:250494] -[UILabel longValue]: unrecognized selector sent to instance 0x7b8e1810 
2015-03-02 19:43:14.876 Final Project[7380:250494] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UILabel longValue]: unrecognized selector sent to instance 0x7b8e1810' 
*** First throw call stack: 
(
    0 CoreFoundation      0x00686946 __exceptionPreprocess + 182 
    1 libobjc.A.dylib      0x02062a97 objc_exception_throw + 44 
    2 CoreFoundation      0x0068e5c5 -[NSObject(NSObject) doesNotRecognizeSelector:] + 277 
    3 CoreFoundation      0x005d73e7 ___forwarding___ + 1047 
    4 CoreFoundation      0x005d6fae _CF_forwarding_prep_0 + 14 
    5 Foundation       0x00b0b6dc _NSSetLongValueForKeyWithMethod + 69 
    6 Foundation       0x00a691c6 _NSSetUsingKeyValueSetter + 257 
    7 Foundation       0x00a690bd -[NSObject(NSKeyValueCoding) setValue:forKey:] + 267 
    8 Foundation       0x00a9e9a6 -[NSObject(NSKeyValueCoding) setValue:forKeyPath:] + 386 
    9 UIKit        0x011cf649 -[UIRuntimeOutletConnection connect] + 106 
    10 libobjc.A.dylib      0x02078724 -[NSObject performSelector:] + 62 
    11 CoreFoundation      0x005c05dc -[NSArray makeObjectsPerformSelector:] + 316 
    12 UIKit        0x011ce10a -[UINib instantiateWithOwner:options:] + 1775 
    13 UIKit        0x00ff0624 -[UIViewController _loadViewFromNibNamed:bundle:] + 270 
    14 UIKit        0x00ff0dbb -[UIViewController loadView] + 295 
    15 UIKit        0x00ff0fef -[UIViewController loadViewIfRequired] + 78 
    16 UIKit        0x00ff1595 -[UIViewController view] + 35 
    17 UIKit        0x01664707 -[_UIFullscreenPresentationController _setPresentedViewController:] + 75 
    18 UIKit        0x00fc6a81 -[UIPresentationController initWithPresentedViewController:presentingViewController:] + 113 
    19 UIKit        0x00ffea61 -[UIViewController _presentViewController:withAnimationController:completion:] + 2102 
    20 UIKit        0x010015d2 __62-[UIViewController presentViewController:animated:completion:]_block_invoke + 345 
    21 UIKit        0x01001424 -[UIViewController presentViewController:animated:completion:] + 224 
    22 UIKit        0x010060be -[UIViewController _showViewController:withAction:sender:] + 213 
    23 UIKit        0x012423b5 -[UIStoryboardShowSegue perform] + 143 
    24 UIKit        0x014b6b49 -[UIStoryboardSegueTemplate _perform:] + 217 
    25 UIKit        0x014b6bc5 -[UIStoryboardSegueTemplate perform:] + 116 
    26 libobjc.A.dylib      0x020787cd -[NSObject performSelector:withObject:withObject:] + 84 
    27 UIKit        0x00e9b23d -[UIApplication sendAction:to:from:forEvent:] + 99 
    28 UIKit        0x00e9b1cf -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 64 
    29 UIKit        0x00fcee86 -[UIControl sendAction:to:forEvent:] + 69 
    30 UIKit        0x00fcf2a3 -[UIControl _sendActionsForEvents:withEvent:] + 598 
    31 UIKit        0x00fce50d -[UIControl touchesEnded:withEvent:] + 660 
    32 UIKit        0x00eeb60a -[UIWindow _sendTouchesForEvent:] + 874 
    33 UIKit        0x00eec0e5 -[UIWindow sendEvent:] + 791 
    34 UIKit        0x00eb1549 -[UIApplication sendEvent:] + 242 
    35 UIKit        0x00ec137e _UIApplicationHandleEventFromQueueEvent + 20690 
    36 UIKit        0x00e95b19 _UIApplicationHandleEventQueue + 2206 
    37 CoreFoundation      0x005aa1df __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15 
    38 CoreFoundation      0x0059fced __CFRunLoopDoSources0 + 253 
    39 CoreFoundation      0x0059f248 __CFRunLoopRun + 952 
    40 CoreFoundation      0x0059ebcb CFRunLoopRunSpecific + 443 
    41 CoreFoundation      0x0059e9fb CFRunLoopRunInMode + 123 
    42 GraphicsServices     0x0441a24f GSEventRunModal + 192 
    43 GraphicsServices     0x0441a08c GSEventRun + 104 
    44 UIKit        0x00e998b6 UIApplicationMain + 1526 
    45 Final Project      0x000e904e top_level_code + 78 
    46 Final Project      0x000e908b main + 43 
    47 libdyld.dylib      0x027cfac9 start + 1 
) 
libc++abi.dylib: terminating with uncaught exception of type NSException 
(lldb)

來源

2015-03-03 MAX

你忘了字符串中的名字嗎？

您的班級是否標有@objc？

來源

2015-03-03 01:06:13

只要看着-[UILabel longValue]: unrecognized selector sent to instance 0x7b8e1810給我答案。您正在將UILabel視爲NSString。

您的代碼中某處有[label longValue]，您的意思是[label.text longValue]。

看了更多的你的調用堆棧。我可以看到，它是在故事板初始化視圖控制器的同時發生的。

您是否對子視圖進行了分類？看起來您可能會無意中將某個屬性的類型從NSString更改爲UILabel。

來源

2015-03-03 01:06:21

所以...我解決了這個問題。原來，答案在我面前始終是正確的（通常是）。無法初始化的標籤與我在同一個類中聲明的Int變量的名稱相同，只與首字母大寫。出於某種原因，我認爲它是區分大小寫的，所以沒關係...

來源

2015-03-07 04:50:05 MAX

Swift錯誤 - 「無法識別的選擇器發送到實例」

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