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我用admob sdk在iPhone 3.1.3（第一代iPhone）上运行应用程序。我不是一直都在想，最近我开始发现这个错误，这是我从未见过的。Admob GADBannerView.m bool _WebTryThreadLock（布尔）iOS iPhone崩溃
<Warning>: bool _WebTryThreadLock(bool), 0x3c3840: Tried to obtain the web lock from a thread other than the main thread or the web thread. This may be a result of calling to UIKit from a secondary thread. Crashing now...
，然后当我跟踪误差下在日志文件中，我看到
Thread 6 Crashed:
0 WebCore 0x00084380 _WebTryThreadLock(bool) + 288
1 WebCore 0x00084ac0 _WebThreadAutoLock() + 52
2 UIKit 0x0022061c -[UIWebView dealloc] + 128
3 CoreFoundation 0x0003963a -[NSObject release] + 28
4 UIKit 0x0000ab2c -[UIView(Hierarchy) removeFromSuperview] + 592
5 UIKit 0x0005ca1c -[UIView dealloc] + 232
6 My iPhone App 0x0008d4e0 0x1000 + 574688
7 CoreFoundation 0x0003963a -[NSObject release] + 28
8 UIKit 0x0000ab2c -[UIView(Hierarchy) removeFromSuperview] + 592
9 UIKit 0x0005ca1c -[UIView dealloc] + 232
10 CoreFoundation 0x0003963a -[NSObject release] + 28
11 UIKit 0x000cad5c -[UIViewController dealloc] + 188
12 My iPhone App 0x00015e60 0x1000 + 85600
13 My iPhone App 0x000135c4 0x1000 + 75204
，并进一步追查下来，并得到了，
-[GADBannerView dealloc] (in My iPhone App) (GADBannerView.m:111)
-[myViewController dealloc] (in My iPhone App) (myViewController.m:378)
-[mySubViewController dealloc] (in My iPhone App) (mySubViewController.m:64)
我不知道是什么继续。有什么我可以做，以防止崩溃或这是admob必须解决的？
任何帮助明白