解决document.title 在 ios 下不生效bug方案 ios内生效

var  body = document.getElementsByTagName( 'body' )[0];
document.title = title;
var  iframe = document.createElement( "iframe" );
iframe.style.display= "none" ;
iframe.setAttribute( "src" ,  "http://named.cn/page/take/img/icon_phone.png" );
var  d =  function () {
   setTimeout( function () {
       iframe.removeEventListener( 'load' , d);
       document.body.removeChild(iframe);
   }, 0);
};
iframe.addEventListener( 'load' , d);
document.body.appendChild(iframe);