iOS - 无法定位异常的位置

Question

发生了什么？

我在程序中遇到异常，在该程序中，要在 UItableViewCell 的 contentView 内的自定义 View 上点击按钮，调用函数

我尝试了什么？

1) 我试图在 Breakpoints Navigator

中添加一个全局异常点

2) 从Instruments

检查僵尸检测

3)应该调用的函数中的断点

我收到的崩溃日志？

-[UIImageView nextPage:]: unrecognized selector sent to instance 0xa7d5f20
 *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIImageView nextPage:]: unrecognized selector sent to instance 0xa7d5f20'
*** First throw call stack:
(
    0   CoreFoundation                      0x023e11e4 __exceptionPreprocess + 180
    1   libobjc.A.dylib                     0x01fc98e5 objc_exception_throw + 44
    2   CoreFoundation                      0x0247e243 -[NSObject(NSObject) doesNotRecognizeSelector:] + 275
    3   CoreFoundation                      0x023d150b ___forwarding___ + 1019
    4   CoreFoundation                      0x023d10ee _CF_forwarding_prep_0 + 14
    5   libobjc.A.dylib                     0x01fdb880 -[NSObject performSelector:withObject:withObject:] + 77
    6   UIKit                               0x009463b9 -[UIApplication sendAction:to:from:forEvent:] + 108
    7   UIKit                               0x00946345 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 61
    8   UIKit                               0x00a47bd1 -[UIControl sendAction:to:forEvent:] + 66
    9   UIKit                               0x00a47fc6 -[UIControl _sendActionsForEvents:withEvent:] + 577
    10  UIKit                               0x00a47243 -[UIControl touchesEnded:withEvent:] + 641
    11  UIKit                               0x00cdc2e3 _UIGestureRecognizerUpdate + 7166
    12  UIKit                               0x00985a5a -[UIWindow _sendGesturesForEvent:] + 1291
    13  UIKit                               0x00986971 -[UIWindow sendEvent:] + 1021
    14  UIKit                               0x009585f2 -[UIApplication sendEvent:] + 242
    15  UIKit                               0x00942353 _UIApplicationHandleEventQueue + 11455
    16  CoreFoundation                      0x0236a77f __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15
    17  CoreFoundation                      0x0236a10b __CFRunLoopDoSources0 + 235
    18  CoreFoundation                      0x023871ae __CFRunLoopRun + 910
    19  CoreFoundation                      0x023869d3 CFRunLoopRunSpecific + 467
    20  CoreFoundation                      0x023867eb CFRunLoopRunInMode + 123
    21  GraphicsServices                    0x0381a5ee GSEventRunModal + 192
    22  GraphicsServices                    0x0381a42b GSEventRun + 104
    23  UIKit                               0x00944f9b UIApplicationMain + 1225
    24  IslamBox                            0x000029bc main + 76
    25  libdyld.dylib                       0x034b3701 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

What else could i do as the functions are registered in the Nib file?

更新:正如日志所说 -[UIImageView nextpage] 无法识别，但下一页位于 ViewController 中。因为自定义 View 是添加到单元格 contentView 的 ViewController View 。

Answer 1

我需要保留我的 ViewController ，或者如果使用 ARC，则保留对它的强引用。如果我将它作为局部变量分配给 cell.contentView，那么当 nextPage: 被调用时，它就不再存在了。 (该错误表明其内存已被释放并重新用于不同类型的对象。)