vue.js实现轮播图

Vue.js可以通过使用第三方插件或者自己编写组件来实现轮播图。以下是一个常用的方式：

1. 使用vue-awesome-swiper插件

vue-awesome-swiper是一个基于Swiper的轮播图插件，可以快速实现轮播图功能。

安装：

npm install vue-awesome-swiper --save

使用：

<template>
  <div class="swiper-container">
    <div class="swiper-wrapper">
      <div class="swiper-slide" v-for="item in list" :key="item.id">
        <img :src="item.imgUrl" alt="">
      </div>
    </div>
    <div class="swiper-pagination"></div>
  </div>
</template>

<script>
import 'swiper/dist/css/swiper.css'
import { swiper, swiperSlide } from 'vue-awesome-swiper'

export default {
  components: {
    swiper,
    swiperSlide
  },
  data() {
    return {
      list: [
        {
          id: 1,
          imgUrl: 'http://xxx/1.jpg'
        },
        {
          id: 2,
          imgUrl: 'http://xxx/2.jpg'
        },
        {
          id: 3,
          imgUrl: 'http://xxx/3.jpg'
        }
      ],
      swiperOption: {
        pagination: {
          el: '.swiper-pagination'
        },
        loop: true
      }
    }
  },
  mounted() {
    console.log('mounted')
  }
}
</script>

2. 自己编写组件

如果需要自定义轮播图的样式和交互，可以自己编写组件实现。

<template>
  <div class="carousel">
    <div class="carousel-item" v-for="(item, index) in list" :key="index">
      <img :src="item.imgUrl" alt="">
    </div>
    <div class="carousel-nav">
      <span class="carousel-nav-item" 
           v-for="(item, index) in list" 
           :key="index" 
           :class="{active: currentIndex === index}" 
           @click="handleClick(index)">
      </span>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      list: [
        {
          id: 1,
          imgUrl: 'http://xxx/1.jpg'
        },
        {
          id: 2,
          imgUrl: 'http://xxx/2.jpg'
        },
        {
          id: 3,
          imgUrl: 'http://xxx/3.jpg'
        }
      ],
      currentIndex: 0
    }
  },
  mounted() {
    this.autoPlay()
  },
  methods: {
    autoPlay() {
      setInterval(() => {
        this.currentIndex = (this.currentIndex + 1) % this.list.length
      }, 2000)
    },
    handleClick(index) {
      this.currentIndex = index
    }
  }
}
</script>

<style scoped>
.carousel {
  position: relative;
  width: 500px;
  height: 300px;
  overflow: hidden;
}

.carousel-item {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.3s;
}

.carousel-item.active {
  opacity: 1;
}

.carousel-nav {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
}

.carousel-nav-item {
  width: 10px;
  height: 10px;
  margin-right: 10px;
  border-radius: 50%;
  background-color: #fff;
  cursor: pointer;
}

.carousel-nav-item.active {
  background-color: #f00;
}
</style>