vue实现图册

Vue实现图册功能

在Vue中实现图册功能通常涉及图片展示、切换、缩放等交互效果。以下是常见的实现方法和关键代码示例：

基础图册组件结构

使用Vue单文件组件构建基础结构：

<template>
  <div class="gallery">
    <div class="main-image">
      <img :src="currentImage" @click="openLightbox">
    </div>
    <div class="thumbnails">
      <img 
        v-for="(img, index) in images" 
        :key="index" 
        :src="img.thumbnail" 
        @click="selectImage(index)"
        :class="{ active: currentIndex === index }"
      >
    </div>

    <lightbox 
      v-if="showLightbox"
      :images="images"
      :currentIndex="currentIndex"
      @close="showLightbox = false"
      @next="nextImage"
      @prev="prevImage"
    />
  </div>
</template>

核心功能实现

数据结构和基本方法：

export default {
  data() {
    return {
      images: [
        { src: 'image1.jpg', thumbnail: 'thumb1.jpg' },
        { src: 'image2.jpg', thumbnail: 'thumb2.jpg' }
      ],
      currentIndex: 0,
      showLightbox: false
    }
  },
  computed: {
    currentImage() {
      return this.images[this.currentIndex].src
    }
  },
  methods: {
    selectImage(index) {
      this.currentIndex = index
    },
    nextImage() {
      this.currentIndex = (this.currentIndex + 1) % this.images.length
    },
    prevImage() {
      this.currentIndex = (this.currentIndex - 1 + this.images.length) % this.images.length
    },
    openLightbox() {
      this.showLightbox = true
    }
  }
}

灯箱组件实现

创建独立的Lightbox组件：

<template>
  <div class="lightbox-overlay" @click.self="$emit('close')">
    <div class="lightbox-content">
      <button class="close-btn" @click="$emit('close')">×</button>
      <img :src="images[currentIndex].src" class="lightbox-image">
      <button class="nav-btn prev" @click="$emit('prev')">‹</button>
      <button class="nav-btn next" @click="$emit('next')">›</button>
    </div>
  </div>
</template>

动画过渡效果

添加Vue过渡动画：

<transition name="fade">
  <lightbox v-if="showLightbox" ... />
</transition>

<style>
.fade-enter-active, .fade-leave-active {
  transition: opacity 0.3s;
}
.fade-enter, .fade-leave-to {
  opacity: 0;
}
.lightbox-image {
  transition: transform 0.3s;
}
</style>

响应式布局处理

使用CSS Grid实现响应式布局：

.gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.thumbnails {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 0.5rem;
}

@media (min-width: 768px) {
  .gallery {
    grid-template-columns: 3fr 1fr;
  }
}

性能优化技巧

实现懒加载和预加载：

// 在mount时预加载下一张图片
mounted() {
  this.preloadNextImage()
},
methods: {
  preloadNextImage() {
    const nextIndex = (this.currentIndex + 1) % this.images.length
    const img = new Image()
    img.src = this.images[nextIndex].src
  },
  nextImage() {
    this.currentIndex = (this.currentIndex + 1) % this.images.length
    this.preloadNextImage()
  }
}

第三方库集成

使用vue-image-lightbox等现成解决方案：

npm install vue-image-lightbox

基本用法示例：

import VueLightbox from 'vue-image-lightbox'

export default {
  components: {
    VueLightbox
  },
  data() {
    return {
      images: ['image1.jpg', 'image2.jpg'],
      showLightbox: false,
      currentLightboxIndex: 0
    }
  }
}

以上实现方案可根据具体需求进行调整和扩展，例如添加图片描述、下载功能或社交分享按钮等。