键盘或鼠标双击

  public float lastTime;
    void Start()
    {
        
    }
     
    void Update()
    {
        if (Input.GetKeyDown(KeyCode.Escape))
        { 
            if (Time.realtimeSinceStartup - lastTime < 0.4f)
            {
                Debug.Log("双击");
                return;
            }
            else  
                lastTime = Time.realtimeSinceStartup;  

        }
    }