问题
I'm getting this issue in Crashlytics and, I really don't know what is causing it. It show me that the error is in my AppDelegate, 15 line, but there is where the class beginning:
class AppDelegate: UIResponder, UIApplicationDelegate {
This is the issue:
Fatal Exception: NSInvalidArgumentException Application tried to present modally an active controller RN.ViewController: 0x1509e200.
Crashed: com.twitter.crashlytics.ios.exception SIGABRT ABORT 0x00000000206e6c5c
0 RN CLSProcessRecordAllThreads + 986
1 RN CLSProcessRecordAllThreads + 986
2 RN CLSProcessRecordAllThreads + 722
3 RN CLSHandler + 30
4 RN __CLSExceptionRecord_block_invoke + 66
5 libdispatch.dylib_dispatch_client_callout + 22
6 libdispatch.dylib_dispatch_barrier_sync_f_invoke + 56
7 RN CLSExceptionRecord + 250
8 RN CLSExceptionRecordNSException + 614
9 RN CLSTerminateHandler() + 544
10 libc++abi.dylib std::__terminate(void (*)()) + 78
11 libc++abi.dylib__cxxabiv1::exception_cleanup_func(_Unwind_Reason_Code, _Unwind_Exception*) + 110
12 libobjc.A.dylib objc_exception_throw + 250
13 UIKit-[UIViewController _presentViewController:withAnimationController:completion:] + 4640
14 UIKit__62-[UIViewController presentViewController:animated:completion:]_block_invoke + 336
15 UIKit-[_UIViewControllerTransitionCoordinator _applyBlocks:releaseBlocks:] + 204
16 UIKit-[_UIViewControllerTransitionContext _runAlongsideCompletions] + 128
17 UIKit-[_UIViewControllerTransitionContext completeTransition:] + 108
18 UIKit-[UIViewAnimationBlockDelegate _didEndBlockAnimation:finished:context:] + 540
19 UIKit-[UIViewAnimationState sendDelegateAnimationDidStop:finished:] + 204
20 UIKit-[UIViewAnimationState animationDidStop:finished:] + 78
21 QuartzCore CA::Layer::run_animation_callbacks(void*) + 252
22 libdispatch.dylib_dispatch_client_callout + 22
23 libdispatch.dylib_dispatch_main_queue_callback_4CF$VARIANT$mp + 1524
24 CoreFoundation CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE + 8
25 CoreFoundation __CFRunLoopRun + 1574
26 CoreFoundation CFRunLoopRunSpecific + 520
27 CoreFoundation CFRunLoopRunInMode + 108
28 GraphicsServices GSEventRunModal + 160
29 UIKit UIApplicationMain + 144
30 RN AppDelegate.swift line 15
Thank you for your help.
回答1:
I had a similar issue with iOS 13. I ended up upgrading the Crashlytics library, since the Crashlytics team fixed a few crashes for iOS 13.
Anyone who has these crashes on iOS 13 devices should upgrade Crashlytics to at least version 3.14.0.
来源：https://stackoverflow.com/questions/50995269/crashed-com-twitter-crashlytics-ios-exception-ios