vue获取swiper当前索引

在对象中增加切换事件,根据realIndex获取当前索引

wiperOption: {
	loop: true,
    slidesPerView: 'auto',
    autoplay: {
    	delay: 4000,
        disableOnInteraction:false
    },
    centeredSlides: true,
    spaceBetween: 1,
    direction : 'vertical',
    navigation: {
    	nextEl: '.swiper-button-next',
    	prevEl: '.swiper-button-prev',
    },
    on:{
    	slideChange: () => {
        	this.exposure(this.$refs.mysWipper.swiper.realIndex)
        },
    }