[游戏开发]Unity双层ScrollRect

在垂直滚动窗体中,水平滚动的窗体组件

using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

public class MyScrollRect : ScrollRect
 {

     //父CustomScrollRect对象
     private MyScrollRect m_Parent;

     public enum Direction
     {
         Horizontal,
         Vertical
     }
     //滑动方向
     private Direction m_Direction = Direction.Horizontal;
     //当前操作方向
     private Direction m_BeginDragDirection = Direction.Horizontal;

     protected override void Awake()
     {
         base.Awake();
         //找到父对象
         Transform parent = transform.parent;
         if (parent)
         {
             m_Parent = parent.GetComponentInParent<MyScrollRect>();
         }
         m_Direction = this.horizontal ? Direction.Horizontal : Direction.Vertical;
     }

     public override void OnBeginDrag(PointerEventData eventData)
     {
         if (m_Parent)
         {
             m_BeginDragDirection = Mathf.Abs(eventData.delta.x) > Mathf.Abs(eventData.delta.y) ? Direction.Horizontal : Direction.Vertical;
             if (m_BeginDragDirection != m_Direction)
             {
                 //当前操作方向不等于滑动方向，将事件传给父对象
                 ExecuteEvents.Execute(m_Parent.gameObject, eventData, ExecuteEvents.beginDragHandler);
                 return;
             }
         }

         base.OnBeginDrag(eventData);
     }

     public override void OnDrag(PointerEventData eventData)
     {
         if (m_Parent)
         {
             if (m_BeginDragDirection != m_Direction)
             {
                 //当前操作方向不等于滑动方向，将事件传给父对象
                 ExecuteEvents.Execute(m_Parent.gameObject, eventData, ExecuteEvents.dragHandler);
                 return;
             }
         }
         base.OnDrag(eventData);
     }

     public override void OnEndDrag(PointerEventData eventData)
     {
         if (m_Parent)
         {
             if (m_BeginDragDirection != m_Direction)
             {
                 //当前操作方向不等于滑动方向，将事件传给父对象
                 ExecuteEvents.Execute(m_Parent.gameObject, eventData, ExecuteEvents.endDragHandler);
                 return;
             }
         }
         base.OnEndDrag(eventData);
     }

     public override void OnScroll(PointerEventData data)
     {
         if (m_Parent)
         {
             if (m_BeginDragDirection != m_Direction)
             {
                 //当前操作方向不等于滑动方向，将事件传给父对象
                 ExecuteEvents.Execute(m_Parent.gameObject, data, ExecuteEvents.scrollHandler);
                 return;
             }
         }
         base.OnScroll(data);
     }
 }