【发布时间】：2011-07-10 20:50:28
【问题描述】：
所以我的应用程序在应用程序停止然后快速重启时崩溃，这是堆栈跟踪：
看起来 UITabBar 正在尝试访问一个为空的视图，因此是 exc_bad_access。我很困惑为什么它只发生在重启时，我的标签栏也是完全在 IB 中创建的。任何想法都会很棒。
异常类型：EXC_BAD_ACCESS (SIGBUS) 异常代码：0x00000000 处的 KERN_PROTECTION_FAILURE 崩溃的线程：0
0x30183f24 objc_msgSend + 24 1 励志名言 0x00009900 0x1000 + 35072
2 UIKit 0x338c37b4 -[UITabBarController transitionFromViewController:toViewController:transition:shouldSetSelected:] + 212
3 UIKit 0x338c36cc -[UITabBarController transitionFromViewController:toViewController:] + 32
4 UIKit 0x338c2d38 -[UITabBarController _setSelectedViewController:] + 248
5 UIKit 0x339cbc44 -[UITabBarController setSelectedViewController:] + 12
6 UIKit 0x339cc888 -[UITabBarController _tabBarItemClicked:] + 308
7 CoreFoundation 0x35eada3c -[NSObject(NSObject) performSelector:withObject:withObject:] + 20
8 UIKit 0x3384af18 -[UIApplication sendAction:to:from:forEvent:] + 128
9 UIKit 0x3384ae80 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 32
10 UIKit 0x33ab1ed8 -[UITabBar _sendAction:withEvent:] + 416
11 CoreFoundation 0x35eada3c -[NSObject(NSObject) performSelector:withObject:withObject:] + 20
12 UIKit 0x3384af18 -[UIApplication sendAction:to:from:forEvent:] + 128
13 UIKit 0x3384ae80 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 32
14 UIKit 0x3384ae48 -[UIControl sendAction:to:forEvent:] + 44
15 UIKit 0x3384aa98 -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 528
16 UIKit 0x3388f338 -[UIControl sendActionsForControlEvents:] + 16
17 UIKit 0x33aae560 -[UITabBar(Static) _buttonUp:] + 108
18 CoreFoundation 0x35eada3c -[NSObject(NSObject) performSelector:withObject:withObject:] + 20
19 UIKit 0x3384af18 -[UIApplication sendAction:to:from:forEvent:] + 128
20 UIKit 0x3384ae80 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 32
21 UIKit 0x3384ae48 -[UIControl sendAction:to:forEvent:] + 44
22 UIKit 0x3384aa98 -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 528
23 UIKit 0x3384b5c4 -[UIControl touchesEnded:withEvent:] + 452
24 UIKit 0x3383cea8 -[UIWindow _sendTouchesForEvent:] + 580
25 UIKit 0x3383c4dc -[UIWindow sendEvent:] + 388
26 UIKit 0x3381fc94 -[UIApplication sendEvent:] + 444
27 UIKit 0x3381f3ac _UIApplicationHandleEvent + 6816
28 图形服务 0x35262c80 PurpleEventCallback + 1040
29 核心基础 0x35e9a5c4 CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION + 22
30 核心基础 0x35e9a582 __CFRunLoopDoSource1 + 158
31 核心基础 0x35e8c82e __CFRunLoopRun + 574
32 CoreFoundation 0x35e8c504 CFRunLoopRunSpecific + 220
33 核心基础 0x35e8c412 CFRunLoopRunInMode + 54
34 图形服务 0x35261d1c GSEventRunModal + 188
35 UIKit 0x33865574 -[UIApplication_run] + 580
36 UIKit 0x33862550 UIApplicationMain + 964
37 励志名言 0x00002b96 0x1000 + 7062
38 条励志名言 0x00002b0c 0x1000 + 6924
【问题讨论】：
标签： iphone stack-trace uitabbar