我有一款适用于iPhone的应用程序。但是，当我在iPad上启动并点击UITextField时，它崩溃了，错误：
Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayM objectAtIndex:]: index 1 beyond bounds [0 .. 0]'
*** First throw call stack:
(
0 CoreFoundation 0x032a05e4 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x02c1e8b6 objc_exception_throw + 44
2 CoreFoundation 0x032414e6 -[__NSArrayM objectAtIndex:] + 246
3 Parking 0x002b0ccd -[UIView(Hackery) pd_swizzled_exchangeSubviewAtIndex:withSubviewAtIndex:] + 141
4 UIKit 0x020a89ef -[_UIBackdropView ensureProperSubviewOrdering] + 666
5 UIKit 0x020a810e -[_UIBackdropView updateSubviewHierarchyIfNeededForSettings:] + 127
6 UIKit 0x020a47dc -[_UIBackdropView setComputesColorSettings:] + 235
7 UIKit 0x01b1c87a -[UIKBBackdropView triggerUpdate:] + 400
8 Foundation 0x028f1bf9 __57-[NSNotificationCenter addObserver:selector:name:object:]_block_invoke + 40
9 CoreFoundation 0x032fc524 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 20
10 CoreFoundation 0x0325400b _CFXNotificationPost + 2859
11 Foundation 0x0282b951 -[NSNotificationCenter postNotificationName:object:userInfo:] + 98
12 UIKit 0x01e1cb1b -[UIInputViewTransition postNotificationsForTransitionEnd] + 1054
13 UIKit 0x0c69c453 -[UIInputViewTransitionAccessibility(SafeCategory) postNotificationsForTransitionEnd] + 51
14 UIKit 0x01e13138 __53-[UIPeripheralHost(UIKitInternal) executeTransition:]_block_invoke1332 + 455
15 UIKit 0x019ef005 -[UIViewAnimationBlockDelegate _didEndBlockAnimation:finished:context:] + 306
16 UIKit 0x019d8c6c -[UIViewAnimationState sendDelegateAnimationDidStop:finished:] + 267
17 UIKit 0x019d8f58 -[UIViewAnimationState animationDidStop:finished:] + 80
18 UIKit 0x0c6a4b67 -[UIViewAnimationStateAccessibility(SafeCategory) animationDidStop:finished:] + 66
19 QuartzCore 0x00821a44 _ZN2CA5Layer23run_animation_callbacksEPv + 304
20 libdispatch.dylib 0x0362b4b0 _dispatch_client_callout + 14
21 libdispatch.dylib 0x0361975e _dispatch_main_queue_callback_4CF + 340
22 CoreFoundation 0x03305a5e __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 14
23 CoreFoundation 0x032466bb __CFRunLoopRun + 1963
24 CoreFoundation 0x03245ac3 CFRunLoopRunSpecific + 467
25 CoreFoundation 0x032458db CFRunLoopRunInMode + 123
26 GraphicsServices 0x03f7d9e2 GSEventRunModal + 192
27 GraphicsServices 0x03f7d809 GSEventRun + 104
28 UIKit 0x0198cd3b UIApplicationMain + 1225
29 Parking 0x00073cad main + 141
30 libdyld.dylib 0x038bd70d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
我尝试评论我的所有代码以找到原因。甚至创建了一个空视图控制器并向其添加文本字段。但它没有帮助。有什么想法吗？