Ios 应用程序正在崩溃，出现错误：“0”；此类不符合key tableView的键值编码；。如何修复？

我有10个连接的UIButtons，在buttonPressed iAction中有不同的标签，我的segue的ID为“GoToDetailVC”

然后我想用标记中的数字替换headerLabel文本

import UIKit

class DetailVC: UIViewController {

@IBOutlet weak var headerLabel: UILabel!

private var _buttonNumber: Int!

var buttonNumber: Int {
    get {
        return _buttonNumber
    }   set {
        _buttonNumber = newValue
    }
}

override func viewDidLoad() {
    super.viewDidLoad()
    headerLabel.text = "\(_buttonNumber!)"
}
override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
}

@IBAction func dismissView(_ sender: UIButton) {
    dismiss(animated: true, completion: nil)        
}
}

它正在崩溃并产生此消息

2016-12-31 12:36:36.439 Core Geometry[2638:539019] *** Terminating app     due to uncaught exception 'NSUnknownKeyException', reason:     '[<Core_Geometry.DetailVC 0x7fc55251aea0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key tableView.'
*** First throw call stack:
(
    0   CoreFoundation                      0x0000000108a67d4b __exceptionPreprocess + 171
1   libobjc.A.dylib                     0x000000010615b21e objc_exception_throw + 48
2   CoreFoundation                      0x0000000108a67c99 -[NSException raise] + 9
3   Foundation                          0x0000000105c699df -[NSObject(NSKeyValueCoding) setValue:forKey:] + 291
4   UIKit                               0x00000001067be293 -[UIViewController setValue:forKey:] + 88
5   UIKit                               0x0000000106a3279e -[UIRuntimeOutletConnection connect] + 109
6   CoreFoundation                      0x0000000108a0c9e0 -[NSArray makeObjectsPerformSelector:] + 256
7   UIKit                               0x0000000106a31122 -[UINib instantiateWithOwner:options:] + 1867
8   UIKit                               0x00000001067c49c5 -[UIViewController _loadViewFromNibNamed:bundle:] + 386
9   UIKit                               0x00000001067c52e7 -[UIViewController loadView] + 177
10  UIKit                               0x00000001067c561c -[UIViewController loadViewIfRequired] + 201
11  UIKit                               0x00000001067c5e70 -[UIViewController view] + 27
12  UIKit                               0x00000001070866a4 -[_UIFullscreenPresentationController _setPresentedViewController:] + 87
13  UIKit                               0x00000001067a0702 -[UIPresentationController initWithPresentedViewController:presentingViewController:] + 141
14  UIKit                               0x00000001067d8e97 -[UIViewController _presentViewController:withAnimationController:completion:] + 3956
15  UIKit                               0x00000001067dc26b -[UIViewController _performCoordinatedPresentOrDismiss:animated:] + 530
16  UIKit                               0x00000001067dbd51 -[UIViewController presentViewController:animated:completion:] + 179
17  UIKit                               0x0000000106de9717 __74-[UIStoryboardPresentationSegueTemplate newDefaultPerformHandlerForSegue:]_block_invoke + 133
18  UIKit                               0x0000000106df91dd -[UIStoryboardSegueTemplate _performWithDestinationViewController:sender:] + 447
19  UIKit                               0x0000000106df8fed -[UIStoryboardSegueTemplate _perform:] + 82
20  UIKit                               0x00000001067c8a1f -[UIViewController performSegueWithIdentifier:sender:] + 99
21  Core Geometry                       0x00000001056c6de1 _TFC13Core_Geometry6MainVC13buttonPressedfT6senderPs9AnyObject__T_ + 465
22  Core Geometry                       0x00000001056c6f86 _TToFC13Core_Geometry6MainVC13buttonPressedfT6senderPs9AnyObject__T_ + 54
23  UIKit                               0x00000001066258bc -[UIApplication sendAction:to:from:forEvent:] + 83
24  UIKit                               0x00000001067abc38 -[UIControl sendAction:to:forEvent:] + 67
25  UIKit                               0x00000001067abf51 -[UIControl _sendActionsForEvents:withEvent:] + 444
26  UIKit                               0x00000001067aae4d -[UIControl touchesEnded:withEvent:] + 668
27  UIKit                               0x0000000106693545 -[UIWindow _sendTouchesForEvent:] + 2747
28  UIKit                               0x0000000106694c33 -[UIWindow sendEvent:] + 4011
29  UIKit                               0x00000001066419ab -[UIApplication sendEvent:] + 371
30  UIKit                               0x0000000106e2e72d __dispatchPreprocessedEventFromEventQueue + 3248
31  UIKit                               0x0000000106e27463 __handleEventQueue + 4879
32  CoreFoundation                      0x0000000108a0c761 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
33  CoreFoundation                      0x00000001089f198c __CFRunLoopDoSources0 + 556
34  CoreFoundation                      0x00000001089f0e76 __CFRunLoopRun + 918
35  CoreFoundation                      0x00000001089f0884 CFRunLoopRunSpecific + 420
36  GraphicsServices                    0x000000010a965a6f GSEventRunModal + 161
37  UIKit                               0x0000000106623c68 UIApplicationMain + 159
38  Core Geometry                       0x00000001056c654f main + 111
39  libdyld.dylib                       0x0000000105b8768d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb) 

2016-12-31 12:36:36.439核心几何[2638:539019]***由于未捕获的异常“NSUnknownKeyException”而终止应用程序，原因：“[setValue:forUndefinedKey:]：此类不符合key tableView的键值编码。”
***第一次抛出调用堆栈：
(
0 CoreFoundation 0x0000000108a67d4b例外预处理+171
1 libobjc.A.dylib 0x000000010615b21e objc_异常_抛出+48
2 CoreFoundation 0x0000000108a67c99-[N异常上升]+9
3基金会0x000 000 0105C699 DF- [ NSO对象（NSKEY ValueCoDIN）SETValue:FordK::] + 291
4 UIKit 0x00000001067be293-[UIViewController设置值：forKey:+88
5 UIKit 0x0000000106a3279e-[UIRuntimeOutletConnection connect]+109
6 CoreFoundation 0x0000000108a0c9e0-[NSArray makeObjectsPerformSelector:+256
7 UIKit 0x0000000106a31122-[UINib实例化所有者：选项：][1867
8 UIKit 0x00000001067c49c5-[UIViewController\u loadViewFromNibNamed:bundle:][386
9 UIKit 0x00000001067c52e7-[UIViewController loadView]+177
10 UIKit 0x00000001067c561c-[UIViewController loadViewIfRequired]+201
11 UIKit 0x00000001067c5e70-[UIViewController视图]+27
12 UIKit 0x00000001070866a4-[\u UIFullScreen显示控制器\u setPresentedViewController:+87
13 UIKit 0x00000001067a0702-[UIPresentationController初始化带PresentedViewController:presentingViewController:+141
14 UIKit 0x00000001067d8e97-[UIViewController\u presentViewController:withAnimationController:completion:+3956
15 UIKit 0x00000001067dc26b-[UIViewController\u性能协调演示文稿：动画：][530
16 UIKit 0x00000001067dbd51-[UIViewController当前视图控制器：动画：完成：][179
17 UIKit 0x0000000106de9717 uu 74-[UIStoryboardPresentationSegueTemplate newDefaultPerformHandlerForSegue:][u block_invoke+133
18 UIKit 0x0000000106df91dd-[UIStoryboardSegueTemplate]性能与目标视图控制器：发送方：][447
19 UIKit 0x0000000106df8fed-[UIStoryboardSegueTemplate]执行：+82
20 UIKit 0x00000001067c8a1f-[UIViewController性能设置，标识符为：发送方：][99
21堆芯几何图形0x00000001056c6de1\u TFC13堆芯几何图形6主VC13按钮按下DFT6发送器9任何对象
22堆芯几何图形0x00000001056c6f86\u TTOFC13堆芯几何图形6主VC13按钮按下DFT6发送器9任何对象
23 UIKit 0x00000001066258bc-[UIApplication sendAction:to:from:forEvent:][83
24 UIKit 0x00000001067abc38-[UIControl发送操作：发送到：forEvent:+67
25 UIKit 0x00000001067abf51-[UIControl\u发送操作预防：带事件：][444
26 UIKit 0x00000001067aae4d-[UIControl触摸附加：withEvent:][668
27 UIKit 0x0000000106693545-[UIWindow\u sendTouchesForEvent:+2747
28 UIKit 0x0000000106694c33-[UIWindow sendEvent:+4011
29 UIKit 0x00000001066419ab-[UIApplication sendEvent:+371
30 UIKit 0x0000000106e2e72d uu调度预处理事件RomeventQueue+3248
31 UIKit 0x0000000106e27463_u handleEventQueue+4879
32 CoreFoundation 0x0000000108a0c761\uuuuu CFRUNLOOP\u正在调用\uu OUT\u以执行\uu函数\uuuuu+17
33 CoreFoundation 0x00000001089f198c\uu CFRunLoopDoSources0+556
34 CoreFoundation 0x00000001089f0e76\uuu CFRunLoopRun+918
35 CoreFoundation 0x00000001089f0884 CFRunLoopRunSpecific+420
36图形服务0x000000010a965a6f GSEventRunModal+161
37 UIKit 0x0000000106623c68 UIApplicationMain+159
38堆芯几何形状0x00000001056c654f主+111
39 libdyld.dylib 0x0000000105b8768d启动+1
)
libc++abi.dylib:以NSException类型的未捕获异常终止
（lldb）

显然，您的nib文件中有问题。首先尝试删除

表视图

和其他视图之间的所有连接。这意味着所有插座（

IBOutlet

）和操作（

IBAction

）。很有可能坠机事件会过去。之后，您可以再次尝试重新连接插座和操作，但请确保操作正确。原因错误表明您正在使用

tableView

连接到一个类，但它没有名为

tableView

的键（属性）。因此，您可能试图与错误的类/对象建立连接。

请在控制台中发布您收到的完整错误，并发布代码，而不是代码的屏幕截图。请检查您的segue连接。我认为（从错误中）它连接不正确

2016-12-31 12:36:36.439 Core Geometry[2638:539019] *** Terminating app     due to uncaught exception 'NSUnknownKeyException', reason:     '[<Core_Geometry.DetailVC 0x7fc55251aea0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key tableView.'
*** First throw call stack:
(
    0   CoreFoundation                      0x0000000108a67d4b __exceptionPreprocess + 171
1   libobjc.A.dylib                     0x000000010615b21e objc_exception_throw + 48
2   CoreFoundation                      0x0000000108a67c99 -[NSException raise] + 9
3   Foundation                          0x0000000105c699df -[NSObject(NSKeyValueCoding) setValue:forKey:] + 291
4   UIKit                               0x00000001067be293 -[UIViewController setValue:forKey:] + 88
5   UIKit                               0x0000000106a3279e -[UIRuntimeOutletConnection connect] + 109
6   CoreFoundation                      0x0000000108a0c9e0 -[NSArray makeObjectsPerformSelector:] + 256
7   UIKit                               0x0000000106a31122 -[UINib instantiateWithOwner:options:] + 1867
8   UIKit                               0x00000001067c49c5 -[UIViewController _loadViewFromNibNamed:bundle:] + 386
9   UIKit                               0x00000001067c52e7 -[UIViewController loadView] + 177
10  UIKit                               0x00000001067c561c -[UIViewController loadViewIfRequired] + 201
11  UIKit                               0x00000001067c5e70 -[UIViewController view] + 27
12  UIKit                               0x00000001070866a4 -[_UIFullscreenPresentationController _setPresentedViewController:] + 87
13  UIKit                               0x00000001067a0702 -[UIPresentationController initWithPresentedViewController:presentingViewController:] + 141
14  UIKit                               0x00000001067d8e97 -[UIViewController _presentViewController:withAnimationController:completion:] + 3956
15  UIKit                               0x00000001067dc26b -[UIViewController _performCoordinatedPresentOrDismiss:animated:] + 530
16  UIKit                               0x00000001067dbd51 -[UIViewController presentViewController:animated:completion:] + 179
17  UIKit                               0x0000000106de9717 __74-[UIStoryboardPresentationSegueTemplate newDefaultPerformHandlerForSegue:]_block_invoke + 133
18  UIKit                               0x0000000106df91dd -[UIStoryboardSegueTemplate _performWithDestinationViewController:sender:] + 447
19  UIKit                               0x0000000106df8fed -[UIStoryboardSegueTemplate _perform:] + 82
20  UIKit                               0x00000001067c8a1f -[UIViewController performSegueWithIdentifier:sender:] + 99
21  Core Geometry                       0x00000001056c6de1 _TFC13Core_Geometry6MainVC13buttonPressedfT6senderPs9AnyObject__T_ + 465
22  Core Geometry                       0x00000001056c6f86 _TToFC13Core_Geometry6MainVC13buttonPressedfT6senderPs9AnyObject__T_ + 54
23  UIKit                               0x00000001066258bc -[UIApplication sendAction:to:from:forEvent:] + 83
24  UIKit                               0x00000001067abc38 -[UIControl sendAction:to:forEvent:] + 67
25  UIKit                               0x00000001067abf51 -[UIControl _sendActionsForEvents:withEvent:] + 444
26  UIKit                               0x00000001067aae4d -[UIControl touchesEnded:withEvent:] + 668
27  UIKit                               0x0000000106693545 -[UIWindow _sendTouchesForEvent:] + 2747
28  UIKit                               0x0000000106694c33 -[UIWindow sendEvent:] + 4011
29  UIKit                               0x00000001066419ab -[UIApplication sendEvent:] + 371
30  UIKit                               0x0000000106e2e72d __dispatchPreprocessedEventFromEventQueue + 3248
31  UIKit                               0x0000000106e27463 __handleEventQueue + 4879
32  CoreFoundation                      0x0000000108a0c761 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
33  CoreFoundation                      0x00000001089f198c __CFRunLoopDoSources0 + 556
34  CoreFoundation                      0x00000001089f0e76 __CFRunLoopRun + 918
35  CoreFoundation                      0x00000001089f0884 CFRunLoopRunSpecific + 420
36  GraphicsServices                    0x000000010a965a6f GSEventRunModal + 161
37  UIKit                               0x0000000106623c68 UIApplicationMain + 159
38  Core Geometry                       0x00000001056c654f main + 111
39  libdyld.dylib                       0x0000000105b8768d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)