js 点击按钮下载图片，另存为

js：

1 $(document).on('click',"#xiazai",function(){
2             imgurl = $(".img-box").find('img').attr('src');
3             window.open('/index/download.html?dir='+imgurl);
4         });

服务端

 1 public function actionDownload($dir,$name){
 2         header('Pragma: public'); // required
 3         header('Expires: 0'); // no cache
 4         header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
 5         header('Cache-Control: private',false);
 6         header('Content-Type: application/force-download');
 7         header('Content-Disposition: attachment; filename="'.$name.'.jpg"');
 8         header('Content-Type: application/octet-stream; name=' . $dir);
 9         header('Content-Transafer-Encoding: binary');
10         header('Connection: close');
11         readfile($dir);
12         exit();
13     }