iOS - 在loadViewIfRequired崩溃

Question

我通常不想要求SO帮助理解我的崩溃报告,但是(a)我可以从这里的专家那里学到很多关于阅读崩溃报告的知识,并且(b),我意识到我对导航的了解不多正如我所希望的那样流动(这部分特定于我认为的崩溃报告).

所以我希望有人遇到同样的问题,可以帮助我理解为什么我的应用程序崩溃了.

它有时只会崩溃,这就是为什么它是断断续续的.但是,当它崩溃时,它会在同一个地方崩溃,并具有相同的堆栈跟踪(如下所示).

现在我看到它在cmdPressed中崩溃了(这个方法中有很多代码),但是我很难理解比这更深的东西.

从阅读下面的崩溃报告,有没有人有任何建议,为什么我的应用程序崩溃？为什么它可能不一致？

Thread 0 Crashed:
0   libobjc.A.dylib                     0x344dd5aa _objc_msgSend + 10
1   UIKit                               0x3374458d -[UIViewController loadViewIfRequired] + 365
2   UIKit                               0x33799133 -[UIViewController contentScrollView] + 27
3   UIKit                               0x33799079 -[UINavigationController _computeAndApplyScrollContentInsetDeltaForViewController:] + 29
4   UIKit                               0x33798f5d -[UINavigationController _layoutViewController:] + 33
5   UIKit                               0x33798e81 -[UINavigationController _updateScrollViewFromViewController:toViewController:] + 273
6   UIKit                               0x337985c1 -[UINavigationController _startTransition:fromViewController:toViewController:] + 65
7   UIKit                               0x337984a9 -[UINavigationController _startDeferredTransitionIfNeeded:] + 325
8   UIKit                               0x337e54b1 -[UINavigationController defaultFirstResponder] + 129
9   UIKit                               0x33797849 -[UIResponder(Internal) _deepestDefaultFirstResponder] + 25
10  UIKit                               0x337976fb -[UIResponder(Internal) _promoteDeepestDefaultFirstResponder] + 31
11  UIKit                               0x33813349 -[UIWindowController transitionViewDidStart:] + 81
12  UIKit                               0x337bf8db -[UITransitionView transition:fromView:toView:removeFromView:] + 991
13  UIKit                               0x33a00059 __91-[UIWindowController transition:fromViewController:toViewController:target:didEndSelector:]_block_invoke_0236 + 389
14  UIKit                               0x33812961 -[UIWindowController transition:fromViewController:toViewController:target:didEndSelector:] + 4761
15  UIKit                               0x33810fc7 -[UIViewController presentViewController:withTransition:completion:] + 3395
16  UIKit                               0x33933257 -[UIViewController presentModalViewController:animated:] + 31
17  MyApp                               0x00044973 -[AppViewController cmdPressed] (AppViewController.mm:553)
18  UIKit                               0x338100a5 -[UIApplication sendAction:to:from:forEvent:] + 73
19  UIKit                               0x33810057 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 31
20  UIKit                               0x33810035 -[UIControl sendAction:to:forEvent:] + 45
21  UIKit                               0x3380f8eb -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 503
22  UIKit                               0x3380fde1 -[UIControl touchesEnded:withEvent:] + 489
23  UIKit                               0x337385f1 -[UIWindow _sendTouchesForEvent:] + 525
24  UIKit                               0x33725801 -[UIApplication sendEvent:] + 381
25  UIKit                               0x3372511b _UIApplicationHandleEvent + 6155
26  GraphicsServices                    0x389085a3 _PurpleEventCallback + 591
27  GraphicsServices                    0x389081d3 PurpleEventCallback + 35
28  CoreFoundation                      0x3a5c8173 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 35
29  CoreFoundation                      0x3a5c8117 __CFRunLoopDoSource1 + 139
30  CoreFoundation                      0x3a5c6f99 __CFRunLoopRun + 1385
31  CoreFoundation                      0x3a539ebd _CFRunLoopRunSpecific + 357
32  CoreFoundation                      0x3a539d49 _CFRunLoopRunInMode + 105
33  GraphicsServices                    0x389072eb _GSEventRunModal + 75
34  UIKit                               0x337792f9 _UIApplicationMain + 1121
35  MyApp                               0x0003d083 main (main.m:44)

任何意见是极大的赞赏.谢谢!!!

Answer 1

尝试添加这个方法。希望对你有帮助。

-(void)setView:(UIView*)view
{
    if(view != nil )
[super setView:view];
    else

        NSLog(@"Memory");
}