UBlackboardComponent::UnregisterObserversFrom

function AIModule Since 4.0

#include "BehaviorTree/BlackboardComponent.h"

Access: public

Description

Removes every observer delegate that was registered with the given owner object, regardless of which key each one watched.

Caveats & Gotchas

• The most reliable way to clean up observers in EndPlay or a component's destructor, since it doesn't require tracking individual FDelegateHandle values.
• Only removes observers registered via RegisterObserver with this exact NotifyOwner pointer — observers registered with a different owner for the same object instance are unaffected.

Signature

void UnregisterObserversFrom(const UObject* NotifyOwner)

Parameters

Name	Type	Description	Default
NotifyOwner	const UObject*	The owner object passed to RegisterObserver when the observers were created.	—

Return Type

void

Example

Clean up all observers owned by this object C++

void AMyAIController::EndPlay(const EEndPlayReason::Type EndPlayReason)
{
    if (UBlackboardComponent* BB = GetBlackboardComponent())
    {
        BB->UnregisterObserversFrom(this);
    }
    Super::EndPlay(EndPlayReason);
}

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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