我在NSWindow中有一个WebView，当我关闭窗口并再次打开它时，应用程序崩溃;（
窗口由菜单项按钮调用。
这是输出：
2011-10-22 15:55:32.440 Textis[17176:903] -[__NSCFType mainFrame]: unrecognized selector sent to instance 0x100514e90
2011-10-22 15:55:32.544 Textis[17176:903] HIToolbox: ignoring exception '-[__NSCFType mainFrame]: unrecognized selector sent to instance 0x100514e90' that raised inside Carbon event dispatch
(
0 CoreFoundation 0x00007fff838b17b4 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x00007fff8127af03 objc_exception_throw + 45
2 CoreFoundation 0x00007fff8390b110 +[NSObject(NSObject) doesNotRecognizeSelector:] + 0
3 CoreFoundation 0x00007fff8388391f ___forwarding___ + 751
4 CoreFoundation 0x00007fff8387fa68 _CF_forwarding_prep_0 + 232
5 Textis 0x0000000100003722 -[Share tweet:] + 210
6 AppKit 0x00007fff84b3eeda -[NSApplication sendAction:to:from:] + 95
7 AppKit 0x00007fff84b6346a -[NSMenuItem _corePerformAction] + 365
8 AppKit 0x00007fff84b631d4 -[NSCarbonMenuImpl performActionWithHighlightingForItemAtIndex:] + 121
9 AppKit 0x00007fff84de8cf4 -[NSMenu _internalPerformActionForItemAtIndex:] + 35
10 AppKit 0x00007fff84c9a9e9 -[NSCarbonMenuImpl _carbonCommandProcessEvent:handlerCallRef:] + 136
11 AppKit 0x00007fff84b4599c NSSLMMenuEventHandler + 321
12 HIToolbox 0x00007fff8665d7f7 _ZL23DispatchEventToHandlersP14EventTargetRecP14OpaqueEventRefP14HandlerCallRec + 1002
13 HIToolbox 0x00007fff8665cd46 _ZL30SendEventToEventTargetInternalP14OpaqueEventRefP20OpaqueEventTargetRefP14HandlerCallRec + 395
14 HIToolbox 0x00007fff8667aa81 SendEventToEventTarget + 45
15 HIToolbox 0x00007fff866a9c35 _ZL18SendHICommandEventjPK9HICommandjjhPKvP20OpaqueEventTargetRefS5_PP14OpaqueEventRef + 387
16 HIToolbox 0x00007fff866d6a0a SendMenuCommandWithContextAndModifiers + 56
17 HIToolbox 0x00007fff866d69c2 SendMenuItemSelectedEvent + 101
18 HIToolbox 0x00007fff866d68d2 _ZL19FinishMenuSelectionP13SelectionDataP10MenuResultS2_ + 150
19 HIToolbox 0x00007fff867dfa69 _ZL19PopUpMenuSelectCoreP8MenuData5PointdS1_tjPK4RecttjS4_S4_PK10__CFStringPP13OpaqueMenuRefPt + 1618
20 HIToolbox 0x00007fff867dfdc2 _HandlePopUpMenuSelection7 + 665
21 AppKit 0x00007fff84c9799b _NSSLMPopUpCarbonMenu3 + 3720
22 AppKit 0x00007fff84ec76f9 -[NSStatusBarButtonCell trackMouse:inRect:ofView:untilMouseUp:] + 162
23 AppKit 0x00007fff84bc92f5 -[NSControl mouseDown:] + 624
24 AppKit 0x00007fff84ae33a7 -[NSWindow sendEvent:] + 5409
25 AppKit 0x00007fff84ec8498 -[NSStatusBarWindow sendEvent:] + 68
26 AppKit 0x00007fff84a18afa -[NSApplication sendEvent:] + 4719
27 AppKit 0x00007fff849af6de -[NSApplication run] + 474
28 AppKit 0x00007fff849a83b0 NSApplicationMain + 364
29 Textis 0x00000001000010c2 main + 34
30 Textis 0x0000000100001094 start + 52
31 ??? 0x0000000000000001 0x0 + 1
)
答案 0 :(得分：1)
mainFrame是WebView上的一种方法
所以
2011-10-22 15:55:32.544 Textis[17176:903] HIToolbox: ignoring exception '-[__NSCFType mainFrame]: unrecognized selector sent to instance 0x100514e90' that raised inside Carbon event dispatch
指向窗口关闭时由OS显式或隐式释放的WebView。你正在砸死指针。
不确定如何设置窗口，但您可能认为原始WebView在重新打开时仍然是有效对象。
看看那个方向。