swiper在loop模式，当轮播到最后一张图时候，做其他事件

1、引入文件：

<link rel="stylesheet" href="css/swiper.min.css">
<script src="js/swiper.min.js"></script>

2、style样式：

html,
        body {
            position: relative;
            height: 100%;
        }
        
        body {
            background: #eee;
            font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
            font-size: 14px;
            color: #000;
            margin: 0;
            padding: 0;
        }
        
        .swiper-container {
            width: 100%;
            height: 100%;
            margin-left: auto;
            margin-right: auto;
        }
        
        .swiper-slide {
            text-align: center;
            font-size: 18px;
            background: #fff;
            /* Center slide text vertically */
            display: -webkit-box;
            display: -ms-flexbox;
            display: -webkit-flex;
            display: flex;
            -webkit-box-pack: center;
            -ms-flex-pack: center;
            -webkit-justify-content: center;
            justify-content: center;
            -webkit-box-align: center;
            -ms-flex-align: center;
            -webkit-align-items: center;
            align-items: center;
        }

3、body：

<div class="swiper-container swiper-no-swiping">
        <div class="swiper-wrapper">
            <div class="swiper-slide">
                <img src="image/n1.jpg" alt="">
            </div>
            <div class="swiper-slide">
                <img src="image/n2.jpg" alt="">
            </div>
            <div class="swiper-slide">
                <img src="image/n3.jpg" alt="">
            </div>
            <div class="swiper-slide">
                <img src="image/n4.jpg" alt="">
            </div>
            <div class="swiper-slide">
                <img src="image/n5.jpg" alt="">
            </div>
        </div>
        <div class="swiper-pagination"></div>
    </div>

4、js：

var swiper = new Swiper('.swiper-container', {
            loop: true, //禁止手动滑动
            direction: 'vertical',
            slidesPerView: 1,
            spaceBetween: 30,
            speed: 500,
            mousewheel: true,
            autoplay: {
                disableOnInteraction: false, //手动滑动之后不打断播放
                delay: 1000
            },
            pagination: {
                el: '.swiper-pagination',
                clickable: true,
            },
　　　　　　　//打印suwper当前图片的索引值
            on: {
                slideChangeTransitionEnd() { 
                    this.active = $('.swiper-slide-active').attr('data-swiper-slide-index')
                    var sum = this.realIndex + 1
                    console.log(sum)
                }
            }
        });