update ios project

update ios project

source/lib/utils/sliver_grid_delegate.dart

@@ -0,0 +1,10 @@
+import 'package:flutter/material.dart';
+
+SliverGridDelegate gridDelegate(BuildContext context) {
+  return SliverGridDelegateWithFixedCrossAxisCount(
+    crossAxisCount: MediaQuery.of(context).size.width > 500.0 ? 4 : 2,
+    mainAxisSpacing: 10,
+    crossAxisSpacing: 10,
+    childAspectRatio: 100 / 150,
+  );
+}