How to see if WidgetClass has been set?

Development Programming & Scripting C++
,
1

I wanna see if a the widget class on a component has been set and if so set it to nullptr. Currently I’m using:

if (LockedOnWidget->GetWidgetClass() != nullptr)
	{
		LockedOnWidget->SetWidgetClass(nullptr);
	}

And it works fine but occasionally it crashes and I don’t know why. Any reasons?
Thanks in advance.:slight_smile:

2

Hi!

Can you, please, provide message that appeared with the crash?

3


Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00000000000004b0

UnrealEditor_Project_TBU!ATargetDummy::EnableWidget() [C:\Users\silen\Documents\Projects\UE\Games\Project_TBU\Source\Project_TBU\TargetDummy.cpp:67]
UnrealEditor_Project_TBU!AMainCharacterTesting::TargetEnemy() [C:\Users\silen\Documents\Projects\UE\Games\Project_TBU\Source\Project_TBU\MainCharacterTesting.cpp:193]
UnrealEditor_Project_TBU!TBaseUObjectMethodDelegateInstance<0,AMainCharacterTesting,void __cdecl(void),FDefaultDelegateUserPolicy>::Execute() [C:\Program Files\Epic Games\UE_5.2\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:535]
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_EnhancedInput
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
kernel32
ntdll

4

Thanks for the vid!

Can you, please, show code from TargetDummy.cpp on row 67?

5

Oh it’s in the video both lines at where it crashes.

6

Oh, you’re right, thanks.

Try adding this code at the beginning of the ATargetDummy::EnableWidget()

if (LockedOnWidget == nullptr)
{
     return;
}
7

Didn’t work but I think I found the cause. It’s something to do with the Overlap events. I’ll keep u up to date.

8

Ty for helping tho.:slight_smile:

9

Use IsValid() function intead nullptr olso… nullptr is not enough for UObject pointers