Unity2D冲刺攻击时如何锁定玩家输入，避免方向变更？

我是Unity2D新手开发者，已实现俯视角角色移动与基础攻击功能，现在尝试实现Dash&Attack（冲刺攻击）：当玩家同时按下奔跑键与攻击键时，角色加速移动一段距离后恢复常规速度。我希望在冲刺发起时锁定角色，让其沿初始朝向完成冲刺，不允许通过输入改变方向（或缩短冲刺距离），但尝试多种条件后，输入仍会被响应处理。我的Movement Controller（移动控制器）与Combat Controller（战斗控制器，处理基础攻击及冲刺攻击逻辑）为分离脚本，以下是相关代码片段：

移动控制器（Movement Controller）代码 #

private void Update()
{
    GatherInput();
}

private void GatherInput()
{
    _moveDirection.x = Input.GetAxisRaw("Horizontal");
    _moveDirection.y = Input.GetAxisRaw("Vertical");
    _isRunning = Input.GetButton("Run");
}

private void FixedUpdate()
{
    UpdateAnimations();
}

private void UpdateAnimations()
{
    if (_moveDirection != Vector2.zero)
    {
        _pc_Animator.SetBool("isMoving", true);
        MovementUpdate();
    }
    else
    {
        _pc_Animator.SetBool("isMoving", false);
        _pc_Animator.SetBool("canMove", false);
    }

    if(Time.time > timeToBlink)
    {
        doBlinkRoutine = DoBlink();
        StartCoroutine(doBlinkRoutine);
    }
}

private void MovementUpdate()
{
    _moveDirection = new Vector2(_moveDirection.x,_moveDirection.y).normalized;
    facingDirection = _moveDirection;

    if (canMove)
    {
        if (!_isRunning)
        {
            _pc_RB.MovePosition(_pc_RB.position + _moveDirection * _moveSpeed * Time.fixedDeltaTime);
            _pc_DirtAnimator.SetBool("isRunning", false);
        }
        else
        {
            _pc_RB.MovePosition(_pc_RB.position + _moveDirection * _moveSpeed * _runningSpeedMultiplier * Time.fixedDeltaTime);
            _pc_DirtAnimator.SetBool("isRunning", true);
        }
    }

    _pc_Animator.SetBool("canMove", canMove);
    _pc_Animator.SetFloat("moveX", _moveDirection.x);
    _pc_Animator.SetFloat("moveY", _moveDirection.y);
}

冲刺攻击（Dash & Slash）逻辑代码 #

private void Update()
{
    CheckCombatInput();
    CheckAttack();
}

private void FixedUpdate()
{
    RunSlashMovement();
}

private void CheckCombatInput()
{
    if (combatEnabled)
    {
        if (Input.GetButtonDown("Attack"))
        {
            // 普通攻击
            gotAttackInput = true;
            lastInputTime = Time.time;
        }
        if (Input.GetButton("Run") && Input.GetButtonDown("Attack") && _pcController.GetMoveDirection() != Vector2.zero)
        {
            // 冲刺攻击
            gotAttackInput = true;
            lastInputTime = Time.time;
            isRun_Slash = true;
        } 
    }
}

private void CheckAttack()
{
    if(gotAttackInput)
    {
        if(!isAttacking && !isRun_Slash)
        {
            gotAttackInput = false;
            isAttacking = true;
        
            // 动画相关
            _pc_Animator.SetBool("isAttacking", isAttacking);

            // 剑轨迹位置设置
            _pcSwordTrailTransform.position = attackHitBoxPos.position + (facingDirectionIn3D * 0.5f);

            _pcSwordAnim.SetBool("isAttacking", isAttacking);
            _pcSwordAnim.SetFloat("posX", facingDirectionIn3D.x);
            _pcSwordAnim.SetFloat("posY", facingDirectionIn3D.y);

            // 播放攻击音效
            PlaySwordAttackSFX();
        } 
        else if (isRun_Slash) 
        {
            if (Time.time >= runSlashCooldown) 
            { 
                gotAttackInput = false;

                // 动画相关
                _pc_Animator.SetBool("isRun&Slash", isRun_Slash);
                _pcSwordAnim.SetBool("isRun&Slash", isRun_Slash);
                _pcSwordAnim.SetFloat("posX", facingDirectionIn3D.x);
                _pcSwordAnim.SetFloat("posY", facingDirectionIn3D.y);

                // 播放攻击音效
                PlaySwordAttackSFX();

                runSlashCooldown = Time.time + 1f;
            }
        }
    }
    if (Time.time >= lastInputTime + inputTimer)
    {
        gotAttackInput = false;
    }
}

private void RunSlashMovement()
{
    if (isRun_Slash) 
    { 
        _pcRB.MovePosition(_pcRB.position + new Vector2(_pcController.GetMoveDirection().x, _pcController.GetMoveDirection().y) * 3.25f * _pcController._moveSpeed * Time.fixedDeltaTime);
    }
}

内容的提问来源于stack exchange，提问作者Andres Martinez