钉钉previewImage无法加载图片问题？

钉钉使用dd.biz.util.previewImage({
                    // 需要预览的图片http链接列表
                    urls : params.urls,
                    // 当前显示图片的http链接
                    current : params.current,
                    onSuccess : function(result) {
                        alert("成功");
                    },
                    onFail : function() {
                        alert("失败");
                    }
                });
无法加载图片，只用百度图片可以加载
http://bf568.cn/wx23/nonlogin/fileupload/downloadfile.htm?id=495804127a2b4101af3cb25c0c766826.png&path=public.files.announcement.&name=weui-icon-cooperate-copy.png&mode=inline
[font=Consolas, 'Lucida Console', monospace]这种项目中的图片无法加载
[font=Consolas, 'Lucida Console', monospace]求大神指点