完善功能

app/common/Qrcode.php

@@ -14,7 +14,7 @@ use Endroid\QrCode\Writer\PngWriter;
 class Qrcode{
     private $logo = null;
     private $label = null;
-    private $size = 600;
+    private $size = 400;
     
     public function __construct() 
     {