$(´#getSignatureCount´).click(function(){
      var pdfIframe = document.getElementById("pdf-iframe");
      var win = pdfIframe.contentWindow;
      var kgFile = win. KGFileApplication;
      //kgFile .setSignUrl("http://192.168.0.140:8080/iWebPDF.js/verify");//设置文件签章验证的URL路径
      //获取域签名签名数量
      var i = kgFile .fileSignatureCount();
      alert(i);
});