我的程序显示了这个问题。谁能告诉我什么是错的？
"2016-08-26 17:21:00.548 SegundaTentativa[2347:203583] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<SegundaTentativa.ViewController 0x7f9749d188d0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key imQuadro.'
*** First throw call stack:
(
0 CoreFoundation 0x000000010786dd85 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x0000000109611deb objc_exception_throw + 48
2 CoreFoundation 0x000000010786d9c9 -[NSException raise] + 9
3 Foundation 0x0000000107c3f19b -[NSObject(NSKeyValueCoding) setValue:forKey:] + 288
4 UIKit 0x0000000108228d0c -[UIViewController setValue:forKey:] + 88
5 UIKit 0x000000010845f7fb -[UIRuntimeOutletConnection connect] + 109
6 CoreFoundation 0x00000001077a7890 -[NSArray makeObjectsPerformSelector:] + 224
7 UIKit 0x000000010845e1de -[UINib instantiateWithOwner:options:] + 1864
8 UIKit 0x000000010822f8d6 -[UIViewController _loadViewFromNibNamed:bundle:] + 381
9 UIKit 0x0000000108230202 -[UIViewController loadView] + 178
10 UIKit 0x0000000108230560 -[UIViewController loadViewIfRequired] + 138
11 UIKit 0x0000000108230cd3 -[UIViewController view] + 27
12 UIKit 0x0000000108106fb4 -[UIWindow addRootViewControllerViewIfPossible] + 61
13 UIKit 0x000000010810769d -[UIWindow _setHidden:forced:] + 282
14 UIKit 0x0000000108119180 -[UIWindow makeKeyAndVisible] + 42
15 UIKit 0x000000010808ded9 -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 4131
16 UIKit 0x0000000108094568 -[UIApplication _runWithMainScene:transitionContext:completion:] + 1769
17 UIKit 0x0000000108091714 -[UIApplication workspaceDidEndTransaction:] + 188
18 FrontBoardServices 0x000000010b4a28c8 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 24
19 FrontBoardServices 0x000000010b4a2741 -[FBSSerialQueue _performNext] + 178
20 FrontBoardServices 0x000000010b4a2aca -[FBSSerialQueue _performNextFromRunLoopSource] + 45
21 CoreFoundation 0x0000000107793301 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
22 CoreFoundation 0x000000010778922c __CFRunLoopDoSources0 + 556
23 CoreFoundation 0x00000001077886e3 __CFRunLoopRun + 867
24 CoreFoundation 0x00000001077880f8 CFRunLoopRunSpecific + 488
25 UIKit 0x0000000108090f21 -[UIApplication _run] + 402
26 UIKit 0x0000000108095f09 UIApplicationMain + 171
27 SegundaTentativa 0x0000000107688432 main + 114
28 libdyld.dylib 0x000000010a0d592d start + 1
29 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb) "
的ViewController：
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var lbTexto: UILabel!
@IBOutlet weak var imgQuadro: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
lbTexto.text = "Que jogador de vôlei e?"
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
@IBAction func ChangeText(sender: AnyObject) {
lbTexto.text = "Ricardinho"
}
@IBAction func HiddenQuadro(sender: AnyObject) {
imgQuadro.hidden = true
}
/*@IBAction func TesteSimbora(sender: UIButton) {
lbText.text = "Ricardinho"
}
@IBAction func EscondeQuadro(sender: UIButton) {
imQuadro.hidden = true
}*/
}
答案 0 :(得分：2)
注意错误信息：
Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<SegundaTentativa.ViewController 0x7f9749d188d0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key imQuadro.'
有些东西试图设置视图控制器的不存在的imQuadro属性，并且当从storyboard / xib加载控制器时，可能会发生堆栈跟踪提示出口。
您很可能在界面构建器中设置了错误的插座连接，如果您最初创建名为imQuadro的插座，然后仅在您的代码中手动将其修改为imgQuadro，则可能会发生错误。