我使用xcodebuild进行自动构建，我发现使用新的xcode 6，如果我不在两个ad hoc构建之间“清理”，那么构建几乎立即就会在设备上崩溃时崩溃。堆栈跟踪如下所示：
Last Exception Backtrace:
0 CoreFoundation 0x2e9bbec6 __exceptionPreprocess + 126
1 libobjc.A.dylib 0x39156ce2 objc_exception_throw + 34
2 CoreFoundation 0x2e9bbe08 +[NSException raise:format:] + 108
3 UIKit 0x3155c3ec -[UINib instantiateWithOwner:options:] + 784
4 UIKit 0x3155dd86 -[NSBundle(UINSBundleAdditions) loadNibNamed:owner:options:] + 134
5 UIKit 0x314643fe -[UIApplication _loadMainNibFileNamed:bundle:] + 30
6 UIKit 0x31256bb6 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 478
7 UIKit 0x311f2c72 -[UIApplication handleEvent:withNewEvent:] + 3546
8 UIKit 0x311f1dd4 -[UIApplication sendEvent:] + 68
9 UIKit 0x312563e0 _UIApplicationHandleEvent + 612
10 GraphicsServices 0x3385fb50 _PurpleEventCallback + 604
11 GraphicsServices 0x3385f73a PurpleEventCallback + 30
12 CoreFoundation 0x2e986802 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 30
13 CoreFoundation 0x2e98679e __CFRunLoopDoSource1 + 342
14 CoreFoundation 0x2e984f6a __CFRunLoopRun + 1402
15 CoreFoundation 0x2e8ef724 CFRunLoopRunSpecific + 520
16 CoreFoundation 0x2e8ef506 CFRunLoopRunInMode + 102
17 UIKit 0x31255606 -[UIApplication _run] + 758
18 UIKit 0x3125086c UIApplicationMain + 1132
我想无论如何在构建之间进行清理会更好，但我不确定我是否在做其他错误。