这段代码只从一开始计算对象，而不计算示例化对象

void Update()
    {
        FindClosestEnemy();
    }

    public void FindClosestEnemy()
    {
        float distanceToClosestEnemy = Mathf.Infinity;
        Enemy closestEnemy = null;
        Enemy[] allEnemies = GameObject.FindObjectsOfType<Enemy>();

        foreach (Enemy currentEnemy in allEnemies)
        {
            float distanceToEnemy = (currentEnemy.transform.position - this.transform.position).sqrMagnitude;
            if (distanceToEnemy < distanceToClosestEnemy)
            {
                distanceToClosestEnemy = distanceToEnemy;
                closestEnemy = currentEnemy;
            }
        }

我尝试了其他最近的敌人探测器，但不知何故，只有这个工作到目前为止