var xhr = new XMLHttpRequest();
xhr.upload.onprogress = function(event){
if (event.lengthComputable) {
var percentComplete = event.loaded / event.total * 100 * 1 / j + i / j * 100;
$('#img_bar').removeClass('progress-bar-danger').addClass('progress-bar-success');
$('#img_bar').width(percentComplete.toFixed(1) + '%')
$('#img_bar').html(percentComplete.toFixed(1) + '%');
}
};
上传进度需要自己计算,event.loaded是已经上传完成的,event.total是总量