Image를 마우스로 드래그할 수 있는 이벤트를 구현하기 위해 UI EventHandler 추가

Assets/Scripts/UI/UI_EventHandler.cs

@@ -0,0 +1,26 @@
+using System;
+using UnityEngine;
+using UnityEngine.EventSystems;
+
+
+public class UI_EventHandler : MonoBehaviour, IBeginDragHandler, IDragHandler
+{
+    public Action<PointerEventData> OnBeginDragHandler = null;
+    public Action<PointerEventData> OnDragHandler = null;
+        
+    public void OnBeginDrag(PointerEventData eventData)
+    {
+        if (OnBeginDragHandler != null)
+        {
+            OnBeginDragHandler.Invoke(eventData);
+        }
+    }
+
+    public void OnDrag(PointerEventData eventData)
+    {
+        if (OnDragHandler != null)
+        {
+            OnDragHandler.Invoke(eventData);
+        }
+    }
+}