iOS - Crash at loadViewIfRequired - iphone

Question

I typically wouldn't want to ask SO for help understanding my crash report, but (a) I can learn a lot about reading crash reports from the experts here, and (b), I realize that I don't understand as much about navigation flow as I hoped (this part is specific to the crash report below I think).
So I'm hoping that someone has come across the same issue and can help me understand why my app is crashing.
It only crashes sometimes, which is beyond me as to why it is intermittent. However, when it does crash, it crashes at the same place, with the same stack trace (shown below).
Now I see that it is crashing in cmdPressed (there's a lot of code in this method), but it's hard for me to understand anything deeper than that.
From reading the crash report below, does anyone have any advice as to why my app is crashing??? And why it might be inconsistent?
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)
Any advice is greatly appreciated. Thanks!!!

Answer 1

I know this is late and also I am not sure if this will solve your problem or not. But when I faced this issue (related with loadViewIfRequired) and struggled a lot because in my case also it was crashing sometimes only. I was calling [UITableViewController tableView] from outside of my tableview controller class which was getting called before loading the tableview. As my tableView wasn't loaded properly so my UITableViewController class was trying to call loadViewIfRequired API and which was calling ViewDidLoad on other thread (not in main thread).
I fixed this by not calling [UITableViewController tableView] this before my tableviewcontroller gets loaded also I loaded that in main thread which fixed my problem.

Answer 2

I faced the same issue. For me, the problem was that I changed the xib file but forgot to connect all the previous outlets.

Answer 3

Try to add this method. Hope this will help you.
-(void)setView:(UIView*)view
{
if(view != nil )
[super setView:view];
else
NSLog(#"Memory");
}