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图片叠加拖拽对比展示效果实现——Vue版

article 2025/1/4 9:53:42

图片叠加拖拽对比展示效果实现——Vue版

项目中遇见一个需求：2张图片按竖线分割，左右两侧分别展示对应图片，通过滚动条拖动对应展示图片区域；;
网上搜索了下，没有找到直接可用的组件，这里自己封装了一个次功能组件；后面会附上完整代码。，希望可以帮助到由此需求的小伙伴；

文章目录

图片叠加拖拽对比展示效果实现——Vue版
- 一、实现效果预览
- 二、HTML 部分
- - 1. 组件包含：头部插槽、底部插槽、切换比较图片组
  - 2. 代码示例
- 三、JS 部分
- - 1. 包含组件传参，左侧图片地址、右侧图片地址、事件处理等
  - 2. JS 部分代码如下：
- 四、 CSS 样式代码
- 六、完整使用示例

一、实现效果预览

在这里插入图片描述

二、HTML 部分

1. 组件包含：头部插槽、底部插槽、切换比较图片组

2. 代码示例

<template>
  <div class="image-comparator">
    <!--  头部插槽  -->
    <slot name="header"></slot>

    <!--   切换对比图片  下一组、上一组 -->
    <div class="prev" @click="prevFun"><i class="el-icon-arrow-left"></i></div>
    <div class="next" @click="nextFun"><i class="el-icon-arrow-right"></i></div>

    <!-- 核心标签代码   -->
    <div class="container" @mouseenter="startDrag" @mousemove="onDrag" @mouseup="endDrag" @mouseleave="endDrag">
      <div class="image-wrapper"
           :style="{ clipPath: `inset(0 ${100 - (dividerPosition / containerWidth * 100)}% 0 0)` }">
        <img src="https://fuss10.elemecdn.com/9/bb/e27858e973f5d7d3904835f46abbdjpeg.jpeg" class="image"/>
      </div>
      <div class="divider" :style="{ left: `${dividerPosition}px` }"></div>
      <div class="image-wrapper" :style="{ clipPath: `inset(0 0 0 ${(dividerPosition / containerWidth * 100)}%)` }">
        <img src="https://fuss10.elemecdn.com/d/e6/c4d93a3805b3ce3f323f7974e6f78jpeg.jpeg" class="image"/>
      </div>
    </div>

    <!--  底部插槽  -->
    <slot name="footer"></slot>

  </div>
</template>

三、JS 部分

1. 包含组件传参，左侧图片地址、右侧图片地址、事件处理等

2. JS 部分代码如下：

<script>

export default {

  name: 'imageComparator',
  props: {
    leftImgUrl: {
      type: String,
    },
    rightImgUrl: {
      type: String,
    },

  },

  data() {
    return {
      containerWidth: 500,
      dividerPosition: 250,
      dragging: false,
      containerRect: null,
    };
  },
  methods: {
    updateContainerWidth() {
      this.containerWidth = this.$el.querySelector('.container').clientWidth;
    },
    startDrag(event) {

      this.dragging = true;
      this.containerRect = this.$el.querySelector('.container').getBoundingClientRect();
    },
    onDrag(event) {
      if (this.dragging && this.containerRect) {
        let newPosition = event.clientX - this.containerRect.left;
        if (newPosition < 0) newPosition = 0;
        if (newPosition > this.containerRect.width) newPosition = this.containerRect.width;
        this.dividerPosition = newPosition;
      }
    },
    endDrag() {
      this.dragging = false;
      this.containerRect = null;
    },
    prevFun() {
      this.$emit('prevFun');
    },
    nextFun() {
      this.$emit('nextFun');

    },
  },
  mounted() {
    this.updateContainerWidth();
    window.addEventListener('resize', this.updateContainerWidth);
  },
  beforeDestroy() {
    window.removeEventListener('resize', this.updateContainerWidth);
  },


};


</script>

四、 CSS 样式代码

<style scoped lang="less">
.image-comparator {
  width: 90%;
  /*max-width: 600px;*/
  margin: 0 auto;

  .container {
    position: relative;
    width: 100%;
    height: 600px;
    overflow: hidden;
  }

  .image-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
  }

  .image {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .divider {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: black;
    cursor: ew-resize;
    z-index: 10;
  }

  .prev, .next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    cursor: pointer;
    font-size: 40px;
    color: white;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 10px;
    border-radius: 50%;
    transition: all 0.3s ease;
    left: 10px;

    &:hover {
      background-color: rgba(0, 0, 0, 0.8);
      color: #0bf4cb;
    }

    &.next {
      right: 10px;
      left: auto;
    }
  }
}


</style>

## 五、总结

本文着重介绍了Vue2 封装的图片分割展示组件，如果小伙伴项目是V3 可以自行修改Vue 组件即可，还有写组件传参地方，需要的话自行改为动态参数即可，这里父组件不做过多介绍，以免浪费小伙伴看代码时间；

六、完整使用示例

以下是一个完整的代码示例

<template>
  <div class="image-comparator">
    <!--  头部插槽  -->
    <slot name="header"></slot>

    <!--   切换对比图片  下一组、上一组 -->
    <div class="prev" @click="prevFun"><i class="el-icon-arrow-left"></i></div>
    <div class="next" @click="nextFun"><i class="el-icon-arrow-right"></i></div>

    <!-- 核心标签代码   -->
    <div class="container" @mouseenter="startDrag" @mousemove="onDrag" @mouseup="endDrag" @mouseleave="endDrag">
      <div class="image-wrapper"
           :style="{ clipPath: `inset(0 ${100 - (dividerPosition / containerWidth * 100)}% 0 0)` }">
        <img src="https://fuss10.elemecdn.com/9/bb/e27858e973f5d7d3904835f46abbdjpeg.jpeg" class="image"/>
      </div>
      <div class="divider" :style="{ left: `${dividerPosition}px` }"></div>
      <div class="image-wrapper" :style="{ clipPath: `inset(0 0 0 ${(dividerPosition / containerWidth * 100)}%)` }">
        <img src="https://fuss10.elemecdn.com/d/e6/c4d93a3805b3ce3f323f7974e6f78jpeg.jpeg" class="image"/>
      </div>
    </div>

    <!--  底部插槽  -->
    <slot name="footer"></slot>

  </div>
</template>


<script>
export default {

  name: 'imageComparator',
  props: {
    leftImgUrl: {
      type: String,
    },
    rightImgUrl: {
      type: String,
    },

  },

  data() {
    return {
      containerWidth: 500,
      dividerPosition: 250,
      dragging: false,
      containerRect: null,
    };
  },
  methods: {
    updateContainerWidth() {
      this.containerWidth = this.$el.querySelector('.container').clientWidth;
    },
    startDrag(event) {

      this.dragging = true;
      this.containerRect = this.$el.querySelector('.container').getBoundingClientRect();
    },
    onDrag(event) {
      if (this.dragging && this.containerRect) {
        let newPosition = event.clientX - this.containerRect.left;
        if (newPosition < 0) newPosition = 0;
        if (newPosition > this.containerRect.width) newPosition = this.containerRect.width;
        this.dividerPosition = newPosition;
      }
    },
    endDrag() {
      this.dragging = false;
      this.containerRect = null;
    },
    prevFun() {
      this.$emit('prevFun');
    },
    nextFun() {
      this.$emit('nextFun');

    },
  },
  mounted() {
    this.updateContainerWidth();
    window.addEventListener('resize', this.updateContainerWidth);
  },
  beforeDestroy() {
    window.removeEventListener('resize', this.updateContainerWidth);
  },


};
</script>
<style scoped lang="less">
.image-comparator {
  width: 90%;
  /*max-width: 600px;*/
  margin: 0 auto;

  .container {
    position: relative;
    width: 100%;
    height: 600px;
    overflow: hidden;
  }

  .image-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
  }

  .image {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .divider {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: black;
    cursor: ew-resize;
    z-index: 10;
  }

  .prev, .next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    cursor: pointer;
    font-size: 40px;
    color: white;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 10px;
    border-radius: 50%;
    transition: all 0.3s ease;
    left: 10px;

    &:hover {
      background-color: rgba(0, 0, 0, 0.8);
      color: #0bf4cb;
    }

    &.next {
      right: 10px;
      left: auto;
    }
  }
}


</style>