备份CatanBuilding瘦身独立工程

Assets/Scripts/UIExtend/SubScrollRect.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.EventSystems;
+using UnityEngine.UI;
+
+public class SubScrollRect : ScrollRect
+{
+    //父ScrollRect对象
+    private ScrollRect 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 Start()
+    {
+        base.Start();
+        //找到父对象
+        Transform parent = transform.parent;
+        m_Parent = parent.GetComponentInParent<ScrollRect>();
+
+        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);
+    }
+}