当我尝试运行（而不是构建）我的 Cocos2d iphone 应用程序时，xcode 突然崩溃。想法？
（我被迫解释得更清楚，所以我会在这里写一些文字。还有一些文字。还有一些文字和一些文字。还有一些文字和一些文字对不起）
UNCAUGHT EXCEPTION (NSInvalidArgumentException): -[__NSCFString countByEnumeratingWithState:objects:count:]: unrecognized selector sent to instance 0x401acf220
UserInfo: (null)
Hints:
0: Replacement view is installing: <IDELogNavigator: 0x40318bd40 representing: <DVTExtension 0x40101c980: Log Navigator (Xcode.IDEKit.Navigator.Logs) v0.1>>
Backtrace:
0 0x00007fff8ca56faa __exceptionPreprocess (in CoreFoundation)
1 0x00007fff88514d5e objc_exception_throw (in libobjc.A.dylib)
2 0x00007fff8cae32ae -[NSObject doesNotRecognizeSelector:] (in CoreFoundation)
3 0x00007fff8ca43e73 ___forwarding___ (in CoreFoundation)
4 0x00007fff8ca43c88 _CF_forwarding_prep_0 (in CoreFoundation)
5 0x000000010ec1e76f -[IDELogNavigator setStateSavingSelectedObjects:] (in IDELogNavigator)
6 0x00007fff8d3e6c6a _NSSetObjectValueAndNotify (in Foundation)
7 0x000000010ec1dd77 -[IDELogNavigator revertStateWithDictionary:] (in IDELogNavigator)
8 0x00000001083e942b -[DVTStateToken _pullStateFromDictionary:] (in DVTFoundation)
9 0x00000001083e91e2 -[DVTStateToken pullStateFromRepository] (in DVTFoundation)
10 0x0000000108d0549d -[IDENavigatorArea replacementView:didInstallViewController:] (in IDEKit)
11 0x00000001085e35f1 __42-[DVTReplacementView _setupViewController]_block_invoke_0 (in DVTKit)
12 0x00000001083ea51e DVTInvokeWithFailureHint (in DVTFoundation)
13 0x00000001085e3473 -[DVTReplacementView _setupViewController] (in DVTKit)
14 0x00000001085e3345 -[DVTReplacementView installedViewController] (in DVTKit)
15 0x0000000108d2f693 -[IDENavigatorArea currentNavigator] (in IDEKit)
16 0x0000000108d4822d -[IDENavigatorArea delegateFirstResponder] (in IDEKit)
17 0x0000000108d91946 -[IDEWorkspaceTabController _changeToNavigatorWithIdentifier:sender:] (in IDEKit)
18 0x0000000108d3f10d -[IDEShowNavigatorAlert runForEvent:inWorkspace:context:completionBlock:] (in IDEKit)
19 0x0000000108a75849 -[IDEAlertEvent runInWorkspace:context:completionBlock:] (in IDEFoundation)
20 0x0000000108d416a1 -[IDERunAlertMonitor executionStart] (in IDEKit)
21 0x00007fff8d3c3fca -[__NSObserver _doit:] (in Foundation)
22 0x00007fff8d3c3e9d __-[NSNotificationCenter addObserverForName:object:queue:usingBlock:]_block_invoke_1 (in Foundation)
23 0x00007fff8c9ffaaa _CFXNotificationPost (in CoreFoundation)
24 0x00007fff8d37ffe7 -[NSNotificationCenter postNotificationName:object:userInfo:] (in Foundation)
25 0x0000000108995240 -[IDEExecutionEnvironment setCurrentLaunchSession:] (in IDEFoundation)
26 0x0000000108994de9 -[IDEExecutionEnvironment _handleLaunchSession:stateChange:] (in IDEFoundation)
27 0x000000010898b94d -[IDEExecutionEnvironment observeValueForKeyPath:ofObject:change:context:] (in IDEFoundation)
28 0x00007fff8d3c67b2 NSKeyValueNotifyObserver (in Foundation)
29 0x00007fff8d3e78eb NSKeyValueDidChange (in Foundation)
30 0x00007fff8d39404b -[NSObject(NSKeyValueObserverNotification) didChangeValueForKey:] (in Foundation)
31 0x00007fff8322a8ba _dispatch_call_block_and_release (in libdispatch.dylib)
32 0x00007fff8322bbeb _dispatch_barrier_sync_f_slow_invoke (in libdispatch.dylib)
33 0x00007fff8322c72a _dispatch_main_queue_callback_4CF (in libdispatch.dylib)
34 0x00007fff8c9ec06c __CFRunLoopRun (in CoreFoundation)
35 0x00007fff8c9eb676 CFRunLoopRunSpecific (in CoreFoundation)
36 0x00007fff8774c31f RunCurrentEventLoopInMode (in HIToolbox)
37 0x00007fff877535c9 ReceiveNextEventCommon (in HIToolbox)
38 0x00007fff87753456 BlockUntilNextEventMatchingListInMode (in HIToolbox)
39 0x00007fff89561f5d _DPSNextEvent (in AppKit)
40 0x00007fff89561861 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] (in AppKit)
41 0x00007fff8955e19d -[NSApplication run] (in AppKit)
42 0x00007fff897dcb88 NSApplicationMain (in AppKit)
43 0x00000001083b9eec (in Xcode)
解决方案：我复制了包含项目的文件夹，然后打开 xcode-project 文件，一切正常。