默认的

app/api/controller/PublicController.php

@@ -107,6 +107,7 @@ class PublicController
         $data['img'] = sys_config('wechat_share_img');
         if (strstr($data['img'], 'http') === false) $data['img'] = sys_config('site_url') . $data['img'];
         $data['img'] = str_replace('\\', '/', $data['img']);
+        $data['qr'] = str_replace('\\', '/', sys_config('wechat_qrcode'););
         $data['title'] = sys_config('wechat_share_title');
         $data['synopsis'] = sys_config('wechat_share_synopsis');
         return app('json')->successful(compact('data'));