【Fix】修复事件重复注册的问题；

UpmGitTool/Assets/Scritps/UI/Controller/UICtrl_PackageItem.cs

@@ -43,14 +43,25 @@ namespace UpmGitTool.UI
             UpdateState();
         }
 
-        public void SetActive(bool active)
+        public void SetActive(bool active) { gameObject.SetActive(active); }
+
+        private void OnEnable() { AddEvents(); }
+
+        private void OnDisable() { RemoveEvents(); }
+
+        private bool IsAddedEvents;
+        private void AddEvents()
         {
-            gameObject.SetActive(active);
+            if (IsAddedEvents) return;
+            IsAddedEvents = true;
+            GYEventsCenter.RegisterEventMsg(Lib.ON_PACKAGE_DATA_REFRESH, OnPackageDataRefresh);
+        }
 
-            if (active)
-                GYEventsCenter.RegisterEventMsg(Lib.ON_PACKAGE_DATA_REFRESH, OnPackageDataRefresh);
-            else
-                GYEventsCenter.RemoveEventMsg(Lib.ON_PACKAGE_DATA_REFRESH, OnPackageDataRefresh);
+        private void RemoveEvents()
+        {
+            if (!IsAddedEvents) return;
+            IsAddedEvents = false;
+            GYEventsCenter.RemoveEventMsg(Lib.ON_PACKAGE_DATA_REFRESH, OnPackageDataRefresh);
         }
 
         #region 选中与否的表现