点击空白区域关闭弹窗

绝地灬酷狼 2022-12-30 14:56 265阅读 0赞

private GraphicRaycaster RaycastInCanvas;
        private EventSystem eventSystem;
        private bool isClick;
    	private Action callBack;
    
        void Start()
        { 
            eventSystem = EventSystem.current;
            if (RaycastInCanvas == null)
                RaycastInCanvas = GetComponentInParent<GraphicRaycaster>();
        }
        private void Update()
        { 
            if (Input.GetMouseButtonDown(0))
            { 
            	//防止一次点击触发多次
                isClick = true;
            }
            if (Input.GetMouseButtonUp(0))
            { 
                if (isClick)
                    CheckGuiRaycastObjects();
            }
        }
        
        public void SetCallBack(Action action)
        { 
        	this.callBack = action;
        }
    
        public bool CheckGuiRaycastObjects()
        { 
            isClick = false;
    
            PointerEventData eventData = new PointerEventData(eventSystem);
            eventData.pressPosition = Input.mousePosition;
            eventData.position = Input.mousePosition;
            List<RaycastResult> list = new List<RaycastResult>();  //存放当前点击获取到的场景物体
            RaycastInCanvas.Raycast(eventData, list);
            if (list.Count > 0)
            { 
            	//遍历点击到的物体
                for (int i = 0; i < list.Count; i++)
                { 
                    GameObject go = list[i].gameObject;
                    if (go.GetComponentInParent<CarriageItem>() != null || go.GetComponent<FreightPop>() != null)
                    { 
                        return false;
                    }
                }
            }
            
            //这里遍历完点击到的物体是空白区域后 做回调
            callBack();
            return true;
        }