swiper的元素更新，需要初始化组件

var mySwiperOut = new Swiper('.swiper-container-out', {
    direction:'horizontal',
    loop: false,
    touchRatio : 8,
    resistance : true,
    resistanceRatio : 0,
    effect : 'fade',
    fade:{crossFade:true},
    observer:true,//修改swiper自己或子元素时，自动初始化swiper
    observeParents:true,//修改swiper的父元素时，自动初始化swiper
    slidesPerView: 2,//可视的slide
  })