扫描功能要【微信或钉钉】等里面集成的H5
https://help.fanruan.com/finereport/doc-view-254.html
参考此文档
https://help.fanruan.com/finereport/doc-view-3878.html
参考一下这个https://bbs.fanruan.com/wenda/question/31849.html