Unity UGUI判断目前鼠标悬浮的是那类UI上

喜欢ヅ旅行 2023-06-08 06:45 23阅读 0赞

using System.Collections;
    using System.Collections.Generic;
    using UnityEngine;
    using UnityEngine.EventSystems;
    using UnityEngine.UI;
    
    public class TestMouseUI : MonoBehaviour
    { 
        GameObject currentCanvas;
        // Start is called before the first frame update
        void Start()
        { 
            currentCanvas = this.gameObject;
        }
    
        // Update is called once per frame
        void Update()
        { 
            //if (EventSystem.current.IsPointerOverGameObject())
            //{ 
            // Debug.Log("当前鼠标悬浮与UI之上");
            //}
    
            if (GetOverUI(currentCanvas) != null && GetOverUI(currentCanvas).tag.Equals("3DUI"))
            { 
                Debug.Log("标签为3DUI的UI");
            }
    
            if (GetOverUI(currentCanvas) != null && GetOverUI(currentCanvas).tag.Equals("UI"))
            { 
                Debug.Log("标签为2DUI");
            }
        }
    
        /// <summary>
        /// 获取鼠标停留处UI
        /// </summary>
        /// <param name="canvas"></param>
        /// <returns>UI物体</returns>
        public static GameObject GetOverUI(GameObject canvas)
        { 
            if (canvas.GetComponent<GraphicRaycaster>() == null) return null;
            PointerEventData pointerEventData = new PointerEventData(EventSystem.current);
            pointerEventData.position = Input.mousePosition;
            GraphicRaycaster gr = canvas.GetComponent<GraphicRaycaster>();
            List<RaycastResult> results = new List<RaycastResult>();
            gr.Raycast(pointerEventData, results);
            if (results.Count != 0)
            { 
                return results[0].gameObject;
            }
            return null;
        }
    }

给需要分类的UI加上相应的标签即可