封装组件之使用vue3封装图片预览组件

ImagePreview.vue

<template>
  <div>
    <!-- 触发预览的图片 -->
    <img :src="src" :alt="alt" class="preview-trigger" @click="openPreview" />

    <!-- 图片预览模态框 -->
    <div v-if="isPreviewOpen" class="preview-modal" @click="closePreview">
      <div class="preview-content" @click.stop>
        <!-- 控制按钮区域 -->
        <div class="controls">
          <button @click="zoomIn">放大</button>
          <button @click="zoomOut">缩小</button>
          <button @click="rotateClockwise">顺时针旋转</button>
          <button @click="rotateCounterClockwise">逆时针旋转</button>
        </div>

        <!-- 图片预览区域 -->
        <img :src="src" :alt="alt" class="preview-image" :style="{ transform: `scale(${scale}) rotate(${rotation}deg)` }" />
      </div>
    </div>
  </div>
</template>

<script>
  import { ref } from 'vue';

  export default {
    name: 'ImagePreview',
    props: {
      src: {
        type: String,
        required: true
      },
      alt: {
        type: String,
        default: 'Image'
      }
    },
    setup(props) {
      // 图片预览状态和变换状态
      const isPreviewOpen = ref(false);
      const scale = ref(1); // 初始缩放比例
      const rotation = ref(0); // 初始旋转角度

      // 打开预览
      const openPreview = () => {
        isPreviewOpen.value = true;
      };

      // 关闭预览
      const closePreview = () => {
        isPreviewOpen.value = false;
      };

      // 放大图片
      const zoomIn = () => {
        if (scale.value < 3) {
          // 设置最大缩放比例
          scale.value += 0.1;
        }
      };

      // 缩小图片
      const zoomOut = () => {
        if (scale.value > 0.5) {
          // 设置最小缩放比例
          scale.value -= 0.1;
        }
      };

      // 顺时针旋转图片
      const rotateClockwise = () => {
        rotation.value += 90;
      };

      // 逆时针旋转图片
      const rotateCounterClockwise = () => {
        rotation.value -= 90;
      };

      return {
        isPreviewOpen,
        scale,
        rotation,
        openPreview,
        closePreview,
        zoomIn,
        zoomOut,
        rotateClockwise,
        rotateCounterClockwise,
        src: props.src,
        alt: props.alt
      };
    }
  };
</script>

<style scoped>
  .preview-trigger {
    cursor: pointer;
    max-width: 100%;
    display: block;
    margin: 0 auto;
  }

  .preview-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
  }

  .preview-content {
    position: relative;
    padding: 20px;
    background: #fff;
    max-width: 90%;
    max-height: 90%;
    overflow: hidden;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
  }

  .preview-image {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    transition: transform 0.3s ease;
  }

  .controls {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
  }

  .controls button {
    background-color: rgba(255, 255, 255, 0.7);
    border: none;
    padding: 10px;
    margin: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
  }

  .controls button:hover {
    background-color: rgba(255, 255, 255, 1);
  }
</style>

使用组件

import ImagePreview from './ImagePreview .vue';

<ImagePreview :style="{ width: '200px', height: '200px' }" :src="imageSrc" :alt="imageAlt" />

效果