unity 解决ScrollRect嵌套滚动问题

在子级有ScrollRect组件的对象添加以下脚本:

using UnityEngine;
using System.Collections;
using UnityEngine.UI;
using UnityEngine.EventSystems;

public class DragEventSyn : MonoBehaviour, IEndDragHandler, IBeginDragHandler, IDragHandler{
    public ScrollRect parentScrollRect;

    void Start(){
        if(parentScrollRect==null){
            GameObject parentScrollRectObj=GameObject.Find("Canvas-category/Scroll View-content");
            Debug.Log(parentScrollRectObj);
            parentScrollRect=parentScrollRectObj.GetComponent<ScrollRect>();
        }
    }

    public void OnEndDrag(PointerEventData eventData){
        if (parentScrollRect){
            parentScrollRect.OnEndDrag(eventData);
        }

    }

    public void OnBeginDrag(PointerEventData eventData){
        if (parentScrollRect){
            parentScrollRect.OnBeginDrag(eventData);
        }

    }

    public void OnDrag(PointerEventData eventData){
        if (parentScrollRect){
            parentScrollRect.OnDrag(eventData);
        }

    }
}