选中对象无用时，隐藏

Assets/BowArrow/Scripts/Expand/SB_EventSystem/MouseConfirm/MouseConfirm.cs

@@ -41,6 +41,8 @@ public class MouseConfirm : MonoBehaviour
                 btnConfirm.gameObject.SetActive(true);
                 GetComponent<Canvas>().sortingOrder = _targetSelectable.GetComponentInParent<Canvas>().sortingOrder + 1;
             }
+        } else {
+            Hide();
         }
     }