策划需求： 滑动大的切页类型（横向）的同时，需滑动子切页中的物品（纵向），但是同一时间只会响应一个
以下代码可以实现这个需求，此需求设计的缺点是物品Item不能得到复用，因为横向切页的时候可以看到两个切页的物品，但是子ScrollView可以做一个循环列表的功能，有好的想法请在下方留言。

using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;
using UnityEditor;/// <summary>
/// 双重ScrollRect的水平移动与垂直移动叠加处理
/// 处理 同一时间 滑动父节点的ScrollRect 和 子节点的ScroollRect
/// 可以在此基础上再加下滑动的容错值
/// </summary>
public class VHScrollRect : ScrollRect
{[HideInInspector]public ScrollRect parentScroll;[HideInInspector]public bool isVertical = true;private bool isSelf = false;protected override void Awake(){parentScroll = transform.parent.parent.parent.GetComponent<ScrollRect>();parentScroll.vertical = false;isVertical = true;}public override void OnBeginDrag(PointerEventData eventData){Vector2 touchDeltaPosition;
#if UNITY_EDITORfloat delta_x = Input.GetAxis("Mouse X");float delta_y = Input.GetAxis("Mouse Y");touchDeltaPosition = new Vector2(delta_x, delta_y);
#endif#if !UNITY_EDITORtouchDeltaPosition = Input.GetTouch(0).deltaPosition;
#endifif (isVertical){if (Mathf.Abs(touchDeltaPosition.x) < Mathf.Abs(touchDeltaPosition.y)){isSelf = true;base.OnBeginDrag(eventData);}else{isSelf = false;parentScroll.OnBeginDrag(eventData);}}else{if (Mathf.Abs(touchDeltaPosition.x) > Mathf.Abs(touchDeltaPosition.y)){isSelf = true;base.OnBeginDrag(eventData);}else{isSelf = false;parentScroll.OnBeginDrag(eventData);}}}public override void OnDrag(PointerEventData eventData){if (isSelf){base.OnDrag(eventData);}else{parentScroll.OnDrag(eventData);}}public override void OnEndDrag(PointerEventData eventData){if (isSelf){base.OnEndDrag(eventData);}else{parentScroll.OnEndDrag(eventData);}}
}#if UNITY_EDITOR[CustomEditor(typeof(VHScrollRect))]
[CanEditMultipleObjects]
public class VHScrollRectInspector : Editor
{VHScrollRect mScrollRect;SerializedProperty parentScrollRect;private void OnEnable(){parentScrollRect = serializedObject.FindProperty("parentScroll");mScrollRect = target as VHScrollRect;}public override void OnInspectorGUI(){base.OnInspectorGUI();EditorGUILayout.LabelField("____________________________________________________________________");serializedObject.Update();EditorGUILayout.PropertyField(parentScrollRect, new GUIContent("父ScrollRect", "父ScrollRect，一定要指定"));bool isVertical = EditorGUILayout.Toggle(new GUIContent("是否是垂直滑动", "是否是垂直滑动"), mScrollRect.isVertical);if (mScrollRect.isVertical != isVertical){mScrollRect.isVertical = isVertical;EditorUtility.SetDirty(mScrollRect);}serializedObject.ApplyModifiedProperties();}
}#endif