sysUserSession 回调地址方法是否存在判断

@@ -268,6 +268,11 @@
     </script>
 </div>
 <input id="api-domain" type="hidden" value="{{apiDomain}}">
+<script type="text/javascript">
+if (typeof call === 'undefined' || typeof call !== 'function') {
+    function call() {}
+}
+</script>
 <script src="{{sysUserSession}}"></script>
 {{/headerdata}}