UInputAction

class EnhancedInput Blueprint Since 5.0

#include "InputAction.h"

Description

A data asset representing a single logical input action (e.g. Jump, Fire, Move). Holds the value type, trigger configuration, and modifier settings. Referenced by UInputMappingContext and bound via UEnhancedInputComponent.

Caveats & Gotchas

• UInputAction assets are shared — the same action asset can be mapped to different keys in different UInputMappingContext assets, enabling remappable input.
• The ValueType (bool, Axis1D, Axis2D, Axis3D) must match what your binding callback expects. A type mismatch produces a zero value at runtime with no error.
• Modifiers and Triggers configured on the UInputAction are applied globally. Per-mapping overrides are set on the mapping within UInputMappingContext.

Example

Reference in a character header C++

// In AMyCharacter.h
UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = Input)
TObjectPtr<UInputAction> JumpAction;

UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = Input)
TObjectPtr<UInputAction> MoveAction;

// Assign the assets in the Character Blueprint's Details panel

Version History

Introduced in: 5.0

Version	Status	Notes
5.6	stable	—

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