【Unity】判断鼠标是否点击在UI上

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;

public class TestUI : MonoBehaviour
{
    void Update()
    {
        if (IsPointerOverGameObject(Input.mousePosition))
        {
            Debug.Log("点击到UI");
        }
    }

    private bool IsPointerOverGameObject(Vector2 mousePosition)
    {
        //创建一个点击事件
        PointerEventData eventData = new PointerEventData(EventSystem.current);
        eventData.position = mousePosition;
        List<RaycastResult> raycastResults = new List<RaycastResult>();
        //向点击位置发射一条射线，检测是否点击UI
        EventSystem.current.RaycastAll(eventData, raycastResults);
        if (raycastResults.Count > 0)
        {
            return true;
        }
        else
        {
            return false;
        }
    }
}