UActorComponent::OnComponentDeactivated

property Engine Blueprint Since 4.14

#include "Components/ActorComponent.h"

Access: public Specifiers: UPROPERTYBlueprintAssignable

Description

Dynamic multicast delegate fired whenever the component is deactivated. Broadcasts the deactivated component.

Caveats & Gotchas

• Fires inside Deactivate() after bIsActive is set to false, so IsActive() returns false inside callbacks. This is important if your callback calls Activate() — it will immediately re-activate.
• This delegate is NOT fired when the component is destroyed — use the component's OnComponentDestroyed delegate or the owning actor's EndPlay for destroy-time cleanup.
• Sparse delegate allocation: memory is not allocated until the first binding is added, so checking OnComponentDeactivated.IsBound() before broadcasting from subclasses is safe and cheap.

Signature

UPROPERTY(BlueprintAssignable, Category = "Components|Activation")
FActorComponentDeactivateSignature OnComponentDeactivated;

Examples

Bind in Blueprint (description) text

// In Blueprint: select the component, go to its Details panel Events section, click '+' next to OnComponentDeactivated to auto-create the event node.

Bind in C++ C++

MyComponent->OnComponentDeactivated.AddDynamic(this, &AMyActor::HandleComponentDeactivated);

void AMyActor::HandleComponentDeactivated(UActorComponent* Component)
{
    UE_LOG(LogTemp, Log, TEXT("%s deactivated"), *Component->GetName());
}

Version History

Introduced in: 4.14

Version	Status	Notes
5.6	stable	—

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