判断鼠标是否点击在UGUI上

#if UNITY_ANDROID && !UNITY_EDITOR#define ANDROID#endif  #if UNITY_IPHONE && !UNITY_EDITOR#define IPHONE#endif   using UnityEngine;using UnityEngine.UI;using System.Collections;using UnityEngine.EventSystems;public class NewBehaviourScript : MonoBehaviour {     // Use this for initialization    void Start () {        }         void Update()    {        if (Input.GetMouseButtonDown(0)||(Input.touchCount >0 && Input.GetTouch(0).phase == TouchPhase.Began))        {#if IPHONE || ANDROID            if (EventSystem.current.IsPointerOverGameObject(Input.GetTouch(0).fingerId))#else            if (EventSystem.current.IsPointerOverGameObject())#endif                Debug.Log("当前触摸在UI上");                        else                 Debug.Log("当前没有触摸在UI上");        }    }}

方法来自：http://www.xuanyusong.com/archives/3327