vue轮播实现左右滑动

实现左右滑动的Vue轮播组件

使用Vue实现轮播组件可以通过多种方式完成，以下是基于vue-awesome-swiper和原生实现两种常见方法。

使用vue-awesome-swiper库

安装依赖包：

npm install swiper vue-awesome-swiper

组件代码示例：

<template>
  <swiper ref="mySwiper" :options="swiperOptions">
    <swiper-slide v-for="(slide, index) in slides" :key="index">
      <img :src="slide.image" />
    </swiper-slide>
    <div class="swiper-button-prev" slot="button-prev"></div>
    <div class="swiper-button-next" slot="button-next"></div>
  </swiper>
</template>

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

export default {
  components: {
    Swiper,
    SwiperSlide
  },
  data() {
    return {
      slides: [
        { image: 'image1.jpg' },
        { image: 'image2.jpg' },
        { image: 'image3.jpg' }
      ],
      swiperOptions: {
        navigation: {
          nextEl: '.swiper-button-next',
          prevEl: '.swiper-button-prev'
        },
        loop: true,
        autoplay: {
          delay: 3000
        }
      }
    }
  }
}
</script>

<style>
.swiper-container {
  width: 100%;
  height: 300px;
}
</style>

原生Vue实现方式

基础实现原理：

<template>
  <div class="carousel" @touchstart="handleTouchStart" @touchend="handleTouchEnd">
    <div class="slides" :style="slideStyle">
      <div v-for="(item, index) in items" :key="index" class="slide">
        <img :src="item.src" />
      </div>
    </div>
    <button @click="prev">Prev</button>
    <button @click="next">Next</button>
  </div>
</template>

<script>
export default {
  data() {
    return {
      items: [
        { src: 'image1.jpg' },
        { src: 'image2.jpg' },
        { src: 'image3.jpg' }
      ],
      currentIndex: 0,
      startX: 0,
      endX: 0
    }
  },
  computed: {
    slideStyle() {
      return {
        transform: `translateX(-${this.currentIndex * 100}%)`,
        transition: 'transform 0.5s ease'
      }
    }
  },
  methods: {
    next() {
      this.currentIndex = (this.currentIndex + 1) % this.items.length
    },
    prev() {
      this.currentIndex = (this.currentIndex - 1 + this.items.length) % this.items.length
    },
    handleTouchStart(e) {
      this.startX = e.touches[0].clientX
    },
    handleTouchEnd(e) {
      this.endX = e.changedTouches[0].clientX
      if (this.startX - this.endX > 50) {
        this.next()
      } else if (this.endX - this.startX > 50) {
        this.prev()
      }
    }
  }
}
</script>

<style>
.carousel {
  position: relative;
  overflow: hidden;
  width: 100%;
  height: 300px;
}
.slides {
  display: flex;
  width: 100%;
  height: 100%;
}
.slide {
  flex: 0 0 100%;
  height: 100%;
}
.slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
</style>

实现无限循环效果

修改原生实现的计算属性和方法：

computed: {
  slideStyle() {
    return {
      transform: `translateX(-${this.currentIndex * 100}%)`,
      transition: this.isTransition ? 'transform 0.5s ease' : 'none'
    }
  }
},
methods: {
  next() {
    this.isTransition = true
    this.currentIndex++
    if (this.currentIndex >= this.items.length) {
      setTimeout(() => {
        this.isTransition = false
        this.currentIndex = 0
      }, 500)
    }
  },
  prev() {
    this.isTransition = true
    this.currentIndex--
    if (this.currentIndex < 0) {
      setTimeout(() => {
        this.isTransition = false
        this.currentIndex = this.items.length - 1
      }, 500)
    }
  }
}

添加自动轮播功能

在原生实现中添加：

mounted() {
  this.startAutoPlay()
},
beforeDestroy() {
  this.stopAutoPlay()
},
methods: {
  startAutoPlay() {
    this.autoPlayInterval = setInterval(() => {
      this.next()
    }, 3000)
  },
  stopAutoPlay() {
    clearInterval(this.autoPlayInterval)
  }
}

以上两种方法都能实现左右滑动轮播效果，使用现成库更简单但灵活性稍差，原生实现更可控但需要处理更多细节。根据项目需求选择合适方案。