修复首页显示空白问题

lib/util/widget_factory.dart

@@ -50,30 +50,25 @@ class WidgetFactory {
         }
       } else {
         if (creater.isSliverChild()) {
-          return _createEmpty(isSliver);
+          return _createEmpty(false);
         } else {
           return result;
         }
       }
+    } else {
+      print('${name} 未注册');
     }
     return _createEmpty(isSliver);
   }
 
   static List<Widget> _createEmpty(bool isSliver) {
-    const bool inProduction = const bool.fromEnvironment("dart.vm.product");
-    if (!inProduction) {
       return isSliver
           ? [
               SliverToBoxAdapter(
-                child: Container(),
+                child: Container(height: 0),
               )
             ]
           : [];
-    } else {
-      return isSliver
-          ? [SliverToBoxAdapter(child: EmptyPage())]
-          : [EmptyPage()];
-    }
   }
 
   /**