Handle actor deletion undo in Unreal Editor?

Development Programming & Scripting C++
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1

I have some objects pointing to a scene component of an actor:

class MyObject 
{
    USceneComponent* Component;
}

When the actor is deleted, all its components are also deleted. So when the delete action is undone (transaction undo), the component pointer (in MyObject) becomes invalid. This is not a problem, but the pointer must be updated after the redo (when the actor and its components are automatically re-created).

How can I detect which actor was created by the redo?

2

UPROPERTY() did the trick!

3

in general you should UPROPERTY() on all UObject pointers (this include actors), as it breaks memory management, garbage cleaning and you have a risk to encounter invalid pointer.