我想通過(guò)iframe來(lái)打印一個(gè)pdf文件，但是有時(shí)候?yàn)g覽器會(huì)警告 Resource interpreted as Document but transferred with MIME type application/pdf 。通過(guò)測(cè)試是能打印的，但是偶爾就會(huì)報(bào)這個(gè)警告不能打印，出現(xiàn)警告無(wú)規(guī)律，點(diǎn)幾次就出。

function test(){
     
      var  iframe = document.getElementById("printIframe");
      iframe.type="application/pdf";
      document.getElementById("printIframe").src = 'GWTJM.pdf';
 
      if (iframe.attachEvent){ 
            iframe.attachEvent("onload", function(){ 
              // alert("Local iframe is now loaded."); 
              document.getElementById("printIframe").contentWindow.print();
        }); 
        } else { 
        iframe.onload = function(){ 
             // alert("Local iframe is now loaded."); 
             document.getElementById("printIframe").contentWindow.print();
        }; 
     } 
       
    }