未捕獲的異常[setValue：forUndefinedKey：]：此類不是密鑰編碼兼容的密鑰btnAvatar

Question

2017-04-13 12:16:36.606 Boardmeeting[4601:1375127] Uncaught exception [<UIViewController 0x7f988fe32750> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key btnAvatar. 
2017-04-13 12:16:36.611 Boardmeeting[4601:1375127] Stack trace: (
    0 CoreFoundation      0x000000010f555d4b __exceptionPreprocess + 171 
    1 libobjc.A.dylib      0x000000010efbe21e objc_exception_throw + 48 
    2 CoreFoundation      0x000000010f555c99 -[NSException raise] + 9 
    3 Foundation       0x000000010d25e9df -[NSObject(NSKeyValueCoding) setValue:forKey:] + 291 
    4 UIKit        0x000000010d90d293 -[UIViewController setValue:forKey:] + 88 
    5 UIKit        0x000000010db8179e -[UIRuntimeOutletConnection connect] + 109 
    6 CoreFoundation      0x000000010f4fa9e0 -[NSArray makeObjectsPerformSelector:] + 256 
    7 UIKit        0x000000010db80122 -[UINib instantiateWithOwner:options:] + 1867 
    8 UIKit        0x000000010d9139c5 -[UIViewController _loadViewFromNibNamed:bundle:] + 386 
    9 UIKit        0x000000010d9142e7 -[UIViewController loadView] + 177 
    10 UIKit        0x000000010d91461c -[UIViewController loadViewIfRequired] + 201 
    11 UIKit        0x000000010d914e70 -[UIViewController view] + 27 
    12 UIKit        0x000000010d9734f3 -[UITabBarController transitionFromViewController:toViewController:transition:shouldSetSelected:] + 483 
    13 UIKit        0x000000010d972935 -[UITabBarController transitionFromViewController:toViewController:] + 59 
    14 UIKit        0x000000010d96e7f6 -[UITabBarController _setSelectedViewController:] + 365 
    15 UIKit        0x000000010d96e57b -[UITabBarController setSelectedIndex:] + 131 
    16 Boardmeeting      0x0000000109746bce -[LoginViewController prepareForSegue:sender:] + 350 
    17 UIKit        0x000000010df4817f -[UIStoryboardSegueTemplate _performWithDestinationViewController:sender:] + 353 
    18 UIKit        0x000000010df47fed -[UIStoryboardSegueTemplate _perform:] + 82 
    19 UIKit        0x000000010d917a1f -[UIViewController performSegueWithIdentifier:sender:] + 99 
    20 Boardmeeting      0x00000001097470ee -[LoginViewController requestFinished:] + 446 
    21 Boardmeeting      0x00000001096fbe9e -[ASIHTTPRequest reportFinished] + 142 
    22 Foundation       0x000000010d27ee9e __NSThreadPerformPerform + 326 
    23 CoreFoundation      0x000000010f4fa761 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 
    24 CoreFoundation      0x000000010f4df98c __CFRunLoopDoSources0 + 556 
    25 CoreFoundation      0x000000010f4dee76 __CFRunLoopRun + 918 
    26 CoreFoundation      0x000000010f4de884 CFRunLoopRunSpecific + 420 
    27 GraphicsServices     0x0000000115158a6f GSEventRunModal + 161 
    28 UIKit        0x000000010d772c68 UIApplicationMain + 159 
    29 Boardmeeting      0x0000000109758eae main + 142 
    30 libdyld.dylib      0x000000011067b68d start + 1 
) 

Answer 1

這通常發生在從類中刪除IBOutlet，但不會刪除Outlet鏈接故事板。

在你的情況下，它是btnAvatar：你可以從你的課程/控制器中刪除這個，但你把它留在故事板上嗎？