如何在虚幻引擎 4 C++ 中的小部件内通过单击的 UI 按钮访问索引？

Question

I am working on a UI menu using Unreal Engine 4 and C++. I have this code (taken from this thread):

H: 
UPROPERTY(meta = (BindWidget)) UButton* TestButton;

UFUNCTION() void OnClick();

CPP:
void UWidgetClassName::NativeConstruct() 
{
    Super::NativeConstruct();

    if (!TestButton->OnClicked.IsBound()) TestButton->OnClicked.AddDynamic(this, &UWidgetClassName::OnClick);
}

void UWidgetClassName::OnClick() 
{
     //I want to access the index of the clicked button here
}

The code is a bit simplified, I actually create this buttons dynamically inside a loop, so I end up with many buttons, all of which call the same function. Is there a way to "know" which button was pressed, so for example if I press the first button, I get 1, if I press the second, I get 2, etc?

Thanks a lot:)

Answer 1

So what you could do is make your own button class which you create dynamically and on click you return some form of identifier like and index or something? If you want to keep it generic you can also add them to some sort of container/list and access the specific button via GetAllChildren on the container which returns an array.

Hope that helps!