Unity 单击双击的判断

private float tapThreshold = 0.25f;
    private float tapTimer = 0.0f;
    private bool tap = false;
    private void Update()
    {
        if (Input.GetMouseButtonDown(0))
        {
            if (Time.time < this.tapTimer + this.tapThreshold)
            {
                Debug.Log("双击");
                this.tap = false;
                return;
            }
            this.tap = true;
            this.tapTimer = Time.time;
        }
        if (this.tap == true && Time.time > this.tapTimer + this.tapThreshold)
        {
            this.tap = false;
            Debug.Log("单击");           
        }
    }