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我试图更好地理解堆栈跟踪的含义。在这种情况下，我有两个具体问题。

1 - 此堆栈跟踪是否意味着方法 setOutcome: 无法被 Task 对象的实例识别？

2 - 如果传入的参数与预期参数的类不匹配，是否会无法识别方法？

012-03-30 01:53:57.988 Arbonne[17625:15203] -[Task setOutcome:]: unrecognized selector sent to instance 0x81b6b60 
2012-03-30 01:53:58.151 Arbonne[17625:15203] ERROR main [Line 20] Uncaught exception: -[Task setOutcome:]: unrecognized selector sent to instance 0x81b6b60 
2012-03-30 01:53:58.154 Arbonne[17625:15203] ERROR main [Line 21] Stack trace: ( 
0 CoreFoundation 0x01d8903e __exceptionPreprocess + 206 
1 libobjc.A.dylib 0x01f1acd6 objc_exception_throw + 44 
2 CoreFoundation 0x01d8acbd -[NSObject doesNotRecognizeSelector:] + 253 
3 CoreFoundation 0x01cefed0 ___forwarding___ + 432 
4 CoreFoundation 0x01cefcb2 _CF_forwarding_prep_0 + 50 
5 Arbonne 0x00030d5d -[TaskViewController addTask:] + 237 
6 CoreFoundation 0x01d8ae99 -[NSObject performSelector:withObject:withObject:] + 73 
7 UIKit 0x0081a14e -[UIApplication sendAction:to:from:forEvent:] + 96 
8 UIKit 0x00a58a0e -[UIBarButtonItem(UIInternal) _sendAction:withEvent:] + 145 
9 CoreFoundation 0x01d8ae99 -[NSObject performSelector:withObject:withObject:] + 73 
10 UIKit 0x0081a14e -[UIApplication sendAction:to:from:forEvent:] + 96 
11 UIKit 0x0081a0e6 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 61 
12 UIKit 0x008c0ade -[UIControl sendAction:to:forEvent:] + 66 
13 UIKit 0x008c0fa7 -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 503 
14 UIKit 0x008c0266 -[UIControl touchesEnded:withEvent:] + 549 
15 UIKit 0x0083f3c0 -[UIWindow _sendTouchesForEvent:] + 513 
16 UIKit 0x0083f5e6 -[UIWindow sendEvent:] + 273 
17 UIKit 0x00825dc4 -[UIApplication sendEvent:] + 464 
18 UIKit 0x00819634 _UIApplicationHandleEvent + 8196 
19 GraphicsServices 0x02653ef5 PurpleEventCallback + 1274 
20 CoreFoundation 0x01d5d195 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 53 
21 CoreFoundation 0x01cc1ff2 __CFRunLoopDoSource1 + 146 
22 CoreFoundation 0x01cc08da __CFRunLoopRun + 2218 
23 CoreFoundation 0x01cbfd84 CFRunLoopRunSpecific + 212 
24 CoreFoundation 0x01cbfc9b CFRunLoopRunInMode + 123 
25 GraphicsServices 0x026527d8 GSEventRunModal + 190 
26 GraphicsServices 0x0265288a GSEventRun + 103 
27 UIKit 0x00817626 UIApplicationMain + 1163 
28 Arbonne 0x0000324f main + 127 
29 Arbonne 0x00002c55 start + 53
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1 回答 1

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  1. 是的
  2. 不，但是一旦您尝试使用该方法执行某些操作，您可能会从该方法中得到一个无法识别的选择器错误-例如，如果您期望一个数组并且您传入一个字符串，然后尝试从您的“数组”中获取一个对象，那时你会得到一个错误。
于 2012-04-04T13:28:29.600 回答