edit

src/Code.php

@@ -51,7 +51,7 @@ class Code
         $data = $wechat->curl('code', $param, true);
 
         if ($data) {
-            $upload = Dever::load('upload/save')->copy('content,' . $data, 1, false, '', 'jpg', $filename);
+            $upload = Dever::load('upload/save')->copy('content,' . $data, 1, false, '', 'png', $filename);
             if (isset($upload['url'])) {
                 return $upload['url'];
             }