Iphone FBLoginView:单击登录按钮后引发错误

我在这里有一个堆栈跟踪，但不知道哪里出了问题，控制台屏幕上也没有明显的输出

> #0    0x01e1f09b in objc_msgSend ()
#1  0x00096ebf in -[FBLoginView informDelegate:] at /Users/jacl/src/release/ios-sdk/src/FBLoginView.m:292
#2  0x00097104 in -[FBLoginView observeValueForKeyPath:ofObject:change:context:] at /Users/jacl/src/release/ios-sdk/src/FBLoginView.m:340
#3  0x01847ce7 in NSKeyValueNotifyObserver ()
#4  0x018613f4 in NSKeyValueDidChange ()
#5  0x01816630 in -[NSObject(NSKeyValueObserverNotification) didChangeValueForKey:] ()
#6  0x018c335a in _NSSetIntValueAndNotify ()
#7  0x0007c9ef in -[FBSession transitionToState:andUpdateToken:andExpirationDate:shouldCache:loginType:] at /Users/jacl/src/release/ios-sdk/src/FBSession.m:767
#8  0x0007b792 in -[FBSession openWithBehavior:completionHandler:] at /Users/jacl/src/release/ios-sdk/src/FBSession.m:350
#9  0x0007f2a6 in +[FBSession openActiveSessionWithPermissions:allowLoginUI:allowSystemAccount:isRead:defaultAudience:completionHandler:] at /Users/jacl/src/release/ios-sdk/src/FBSession.m:1558
#10 0x0007bff1 in +[FBSession openActiveSessionWithPublishPermissions:defaultAudience:allowLoginUI:completionHandler:] at /Users/jacl/src/release/ios-sdk/src/FBSession.m:545
#11 0x000973f9 in -[FBLoginView buttonPressed:] at /Users/jacl/src/release/ios-sdk/src/FBLoginView.m:391

---

以前有人看到过这个错误吗？当我单击FBLoginView中的登录按钮时会发生这种情况，您的问题可能是FBLoginView对象在消息发送到它之前被解除分配。在方案中启用“僵尸对象”，以获得更清晰的输出

如果需要更详细的答案，请将代码粘贴到使用FBLoginView的位置