diff --git a/Runtime/GuruIAP/Runtime/Code/IAPServiceBase.cs b/Runtime/GuruIAP/Runtime/Code/IAPServiceBase.cs
index 07f359e..91aa81c 100644
--- a/Runtime/GuruIAP/Runtime/Code/IAPServiceBase.cs
+++ b/Runtime/GuruIAP/Runtime/Code/IAPServiceBase.cs
@@ -35,7 +35,7 @@ namespace Guru
         private Dictionary<string, ProductInfo> _products;
         protected Dictionary<string, ProductInfo> Products => _products;
 
-        public bool IsInitialized => _storeController != null && _storeExtensionProvider != null;
+        public bool IsInitialized => _storeController != null && _storeExtensionProvider != null && _model != null;
 
         private ProductInfo _curProductInfo = null;
         private string _curProductCategory = "";
@@ -881,7 +881,10 @@ namespace Guru
         /// <param name="value"></param>
         public static void SetIsIAPUser(bool value = true)
         {
-            Instance._model.SetIsIapUser(value); // 用户属性
+            if (Instance != null && Instance._model != null)
+            {
+                Instance._model.SetIsIapUser(value); // 用户属性
+            }
             Analytics.SetUserProperty(Analytics.PropertyIsIAPUser, value ? "true" : "false");
         }