Crash on -[UIView(DAKeyboardControl) inputKeyboardDidShow]

[chrisballinger]

Not sure how to reproduce, but has been showing up in my crash logs. Here is the section that has problems (line 222):

- (void)inputKeyboardDidShow
{
    // Grab the keyboard view
    self.keyboardActiveView = self.keyboardActiveInput.inputAccessoryView.superview; // This line causes crashes sometimes
    self.keyboardActiveView.hidden = NO;

    // If the active keyboard view could not be found (UITextViews...), try again
    if (!self.keyboardActiveView) {
        // Find the first responder on subviews and look re-assign first responder to it
        [self reAssignFirstResponder];
    }
}

Here are two of them:

Application Specific Information:
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UICTFontDescriptor inputAccessoryView]: unrecognized selector sent to instance 0x16eeb850'

Last Exception Backtrace:
0   CoreFoundation                       0x2e522f4b __exceptionPreprocess + 131
1   libobjc.A.dylib                      0x38cff6af objc_exception_throw + 36
2   CoreFoundation                       0x2e5268e7 -[NSObject(NSObject) doesNotRecognizeSelector:] + 200
3   CoreFoundation                       0x2e5251cb ___forwarding___ + 704
4   CoreFoundation                       0x2e4744d8 _CF_forwarding_prep_0 + 22
5   ChatSecure                           0x00201437 -[UIView(DAKeyboardControl) inputKeyboardDidShow] (DAKeyboardControl.m:222)
6   CoreFoundation                       0x2e4e5119 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 10
7   CoreFoundation                       0x2e459257 _CFXNotificationPost + 1716
8   Foundation                           0x2ee3ec2d -[NSNotificationCenter postNotificationName:object:userInfo:] + 74
9   UIKit                                0x30d5ab89 -[UIInputViewTransition postNotificationsForTransitionEnd] + 942
10  UIKit                                0x310d6e6d __53-[UIPeripheralHost(UIKitInternal) executeTransition:]_block_invoke1332 + 370
11  UIKit                                0x30ccd7c9 -[UIViewAnimationBlockDelegate _didEndBlockAnimation:finished:context:] + 282
12  UIKit                                0x30ccd417 -[UIViewAnimationState sendDelegateAnimationDidStop:finished:] + 176
13  UIKit                                0x30ccd333 -[UIViewAnimationState animationDidStop:finished:] + 68
14  QuartzCore                           0x30923729 CA::Layer::run_animation_callbacks(void*) + 230
15  libdispatch.dylib                    0x391e2d07 _dispatch_client_callout + 20
16  libdispatch.dylib                    0x391e978d _dispatch_main_queue_callback_4CF$VARIANT$mp + 266
17  CoreFoundation                       0x2e4ed819 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 6
18  CoreFoundation                       0x2e4ec0ed __CFRunLoopRun + 1298
19  CoreFoundation                       0x2e456c27 CFRunLoopRunSpecific + 520
20  CoreFoundation                       0x2e456a0b CFRunLoopRunInMode + 104
21  GraphicsServices                     0x33137283 GSEventRunModal + 136
22  UIKit                                0x30cfa049 UIApplicationMain + 1134
23  ChatSecure                           0x0000f667 main (main.m:31)
24  libdyld.dylib                        0x39207ab7 start + 0

Here is the second one:

Exception Type:  SIGSEGV
Exception Codes: SEGV_ACCERR at 0x1001c
Crashed Thread:  0

Thread 0 Crashed:
0   libobjc.A.dylib                      0x38cfc0ec objc_retain + 12
1   ChatSecure                           0x00275423 -[UIView(DAKeyboardControl) inputKeyboardDidShow] (DAKeyboardControl.m:222)
2   CoreFoundation                       0x2e4e5119 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 10
3   CoreFoundation                       0x2e459257 _CFXNotificationPost + 1716
4   Foundation                           0x2ee3ec2d -[NSNotificationCenter postNotificationName:object:userInfo:] + 74
5   UIKit                                0x30d5ab89 -[UIInputViewTransition postNotificationsForTransitionEnd] + 942
6   UIKit                                0x310d6e6d __53-[UIPeripheralHost(UIKitInternal) executeTransition:]_block_invoke1332 + 370
7   UIKit                                0x30ccd7c9 -[UIViewAnimationBlockDelegate _didEndBlockAnimation:finished:context:] + 282
8   UIKit                                0x30ccd417 -[UIViewAnimationState sendDelegateAnimationDidStop:finished:] + 176
9   UIKit                                0x30ccd333 -[UIViewAnimationState animationDidStop:finished:] + 68
10  QuartzCore                           0x30923729 CA::Layer::run_animation_callbacks(void*) + 230
11  libdispatch.dylib                    0x391e2d07 _dispatch_client_callout + 20
12  libdispatch.dylib                    0x391e978d _dispatch_main_queue_callback_4CF$VARIANT$mp + 266
13  CoreFoundation                       0x2e4ed819 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 6
14  CoreFoundation                       0x2e4ec0ed __CFRunLoopRun + 1298
15  CoreFoundation                       0x2e456c27 CFRunLoopRunSpecific + 520
16  CoreFoundation                       0x2e456a0b CFRunLoopRunInMode + 104
17  GraphicsServices                     0x33137283 GSEventRunModal + 136
18  UIKit                                0x30cfa049 UIApplicationMain + 1134
19  ChatSecure                           0x00083667 main (main.m:31)
20  libdyld.dylib                        0x39207ab7 start + 0

I'll update the issue when more information is available.

[vngah]

Also having the same issue. my app crashes on a long press gesture with a text view.

[bnickel]

We're encountering this issue on our app when a keyboard appears after using a UIAlertView with a text view.

It appear that:

1. The alert view appears and the text field becomes active, setting keyboardActiveInput.
2. The alert view dismisses causing keyboardActiveInput to become a zombie.
3. The text view in the original window presents its keyboard without or before posting UITextViewTextDidBeginEditingNotification.
4. UIKeyboardDidShowNotification is posted, accessing the zombie.

One solution that seems to be working for me is to filter messages to setKeyboardActiveInput: where the responder is not in the same window as the view:

- (void)setKeyboardActiveInput:(UIResponder *)keyboardActiveInput
{
    if (![keyboardActiveInput respondsToSelector:@selector(window)] || [(id)keyboardActiveInput window] != self.window) {
        keyboardActiveInput = nil;
    }

    ...

[joshuafeldman]

We are seeing this issue as well in our crash reporting system. I was able to isolate one which was a timing issue with presenting an alert at the same time the keyboard was being dismissed. But another instance I am having a hard time tracking down