当我想将UITextField的文本发送到另一个视图时遇到了问题。在调试时，它会一直运行到prepareForSegue函数结束，并且不会发生错误。
我不知道“无法识别的选择器发送到实例0x7f9272d996d0”是什么意思。你能解释一下吗？
以下是全班：
class ViewController: UIViewController, UITextFieldDelegate {
@IBOutlet var searchText: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
searchText.clearButtonMode = UITextFieldViewMode.WhileEditing
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
let symbol: String = self.searchText.text!
print(symbol) // this print function works
let detail:DetailController = segue.destinationViewController as! DetailController
detail.symbol = symbol
}
}
以下是异常输出。
2016-04-23 17:15:41.648 stockSearch[51526:12944707] -[stockSearch.ViewController searchTextfield:]: unrecognized selector sent to instance 0x7f9272d996d0
2016-04-23 17:15:41.653 stockSearch[51526:12944707] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[stockSearch.ViewController searchTextfield:]: unrecognized selector sent to instance 0x7f9272d996d0'
*** First throw call stack:
(
0 CoreFoundation 0x0000000102a4fd85 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x00000001047f3deb objc_exception_throw + 48
2 CoreFoundation 0x0000000102a58d3d -[NSObject(NSObject) doesNotRecognizeSelector:] + 205
3 CoreFoundation 0x000000010299ecfa ___forwarding___ + 970
4 CoreFoundation 0x000000010299e8a8 _CF_forwarding_prep_0 + 120
5 UIKit 0x0000000103279a8d -[UIApplication sendAction:to:from:forEvent:] + 92
6 UIKit 0x00000001033ece67 -[UIControl sendAction:to:forEvent:] + 67
7 UIKit 0x00000001033ed143 -[UIControl _sendActionsForEvents:withEvent:] + 327
8 UIKit 0x0000000103c766c5 -[UITextField _resignFirstResponder] + 298
9 UIKit 0x000000010348ba1a -[UIResponder _finishResignFirstResponder] + 292
10 UIKit 0x0000000103c764ef -[UITextField _finishResignFirstResponder] + 49
11 UIKit 0x000000010348bb3b -[UIResponder resignFirstResponder] + 254
12 UIKit 0x0000000103c763bc -[UITextField resignFirstResponder] + 136
13 UIKit 0x000000010348cf70 -[UIResponder _resignIfContainsFirstResponder] + 270
14 UIKit 0x00000001033207c4 -[UIView(Hierarchy) _willMoveToWindow:] + 597
15 UIKit 0x000000010332ec9e -[UIView(Internal) _addSubview:positioned:relativeTo:] + 481
16 UIKit 0x000000010325f9c8 __53-[_UINavigationParallaxTransition animateTransition:]_block_invoke_2 + 2217
17 UIKit 0x0000000103327680 +[UIView(Animation) performWithoutAnimation:] + 65
18 UIKit 0x000000010325f0bd __53-[_UINavigationParallaxTransition animateTransition:]_block_invoke + 270
19 UIKit 0x000000010332d82b +[UIView(Internal) _performBlockDelayingTriggeringResponderEvents:] + 188
20 UIKit 0x000000010325eb02 -[_UINavigationParallaxTransition animateTransition:] + 1465
21 UIKit 0x00000001034492d9 -[UINavigationController _startCustomTransition:] + 4156
22 UIKit 0x0000000103458b9b -[UINavigationController _startDeferredTransitionIfNeeded:] + 712
23 UIKit 0x0000000103459d0b -[UINavigationController __viewWillLayoutSubviews] + 57
24 UIKit 0x0000000103608503 -[UILayoutContainerView layoutSubviews] + 248
25 UIKit 0x0000000103332980 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 703
26 QuartzCore 0x0000000107896c00 -[CALayer layoutSublayers] + 146
27 QuartzCore 0x000000010788b08e _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 366
28 QuartzCore 0x000000010788af0c _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 24
29 QuartzCore 0x000000010787f3c9 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 277
30 QuartzCore 0x00000001078ad086 _ZN2CA11Transaction6commitEv + 486
31 UIKit 0x000000010327272e _UIApplicationHandleEventQueue + 7135
32 CoreFoundation 0x0000000102975301 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
33 CoreFoundation 0x000000010296b22c __CFRunLoopDoSources0 + 556
34 CoreFoundation 0x000000010296a6e3 __CFRunLoopRun + 867
35 CoreFoundation 0x000000010296a0f8 CFRunLoopRunSpecific + 488
36 GraphicsServices 0x0000000106c7ead2 GSEventRunModal + 161
37 UIKit 0x0000000103277f09 UIApplicationMain + 171
38 stockSearch 0x00000001023fee52 main + 114
39 libdyld.dylib 0x00000001052b792d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException