效果图:
我写的是vue的组件形式,方便复用,图片的宽高,缩放的比例可以自己定义
magnifier.vue
<template> <div class="magnify"> <!-- 左边产品图片区域 --> <div class="left_contaner"> <div class="middle_img" @mouseover="boxMouseOver" @mouseleave="boxMouseLeave"> <!-- 产品图片 --> <img :src="middleImg" alt=""> <!-- 阴影盒子 --> <div class="shade" @mouseover="shadeMouseOver" @mousemove="shadeMouseMove" ref="shade" v-show="isShade"></div> </div> <!-- 缩略图容器 --> <div class="carousel"> <!-- 左箭头 --> <div class="left_arrow arrow" @click="leftArrowClick"></div> <!-- 缩略图展示盒子 --> <div class="show_box"> <ul class="picture_container" ref="middlePicture"> <li class="picture_item" @mouseover="tabPicture(item)" v-for="(item, index) in pictureList" :key="index"> <img :src="item.url" class="small_img" alt=""> </li> </ul> </div> <!-- 向右箭头 --> <div class="right_arrow arrow" @click="rightArrowClick"></div> </div> </div> <!-- 右边放大区域 --> <div class="right_contanier" v-show="isBig"> <img :src="middleImg" ref="bigImg" class="big_img" alt=""> </div> </div> </template> <script> import $ from \'jquery\' export default { props: { middleImgWidth: { default: 350, type: Number }, // 产品图片宽 middleImgHeight: { default: 400, type: Number }, // 产品图片高 thumbnailHeight: { default: 100, type: Number }, // 缩略图容器高度 imgList: Array, // 图片数据 zoom: { default: 2, // 缩略比例,放大比例 type: Number } }, data() { return { pictureList: [ {url: \'http://mp.ofweek.com/Upload/News/Img/member645/201711/17170046839337.jpg\'}, {url: \'http://image.buy.ccb.com/merchant/201703/904919627/1522929521661_4.jpg\'}, {url: \'http://image5.suning.cn/uimg/b2c/newcatentries/0070130691-000000000826244625_5_800x800.jpg\'}, {url: \'http://img12.360buyimg.com/n5/s450x450_jfs/t9952/98/2269407420/279171/6137fe2f/59f28b2bN6959e086.jpg\'}, {url: \'http://d.ifengimg.com/w600/p0.ifengimg.com/pmop/2017/1213/A4037864F6728F006B67AAEC51EC8A485F320FD2_size93_w1024_h734.jpeg\'}, {url: \'http://d.ifengimg.com/w600/p0.ifengimg.com/pmop/2017/1213/A4037864F6728F006B67AAEC51EC8A485F320FD2_size93_w1024_h734.jpeg\'} ], middleImg: \'\', // 中图图片地址 bigImg: \'\', // 大图图片地址 isShade: false, // 控制阴影显示与否 isBig: false, // 控制放大图显示与否 initX: 0, // 初始clientX值 initY: 0, // 初始clientY值 leftX: 0, // 初始定位left topY: 0, // 初始定位top middleLeft: 0, // 当前放置小图盒子的定位left值, itemWidth: 80, // 缩略图每张的宽度 } }, created() { if (this.imgList && this.imgList.length) { this.pictureList = this.imgList } this.middleImg = this.pictureList[0].url // 计算缩略图的宽度,默认是显示4张图片,两边箭头的宽度和为50 this.itemWidth = (this.middleImgWidth-50) / 4 }, mounted() { this.$nextTick(() => { // 容器的高 const imgWidth = this.middleImgHeight + this.thumbnailHeight + 20 // 设置容器宽高 $(\'.magnify\').css({ width: this.middleImgWidth, height: imgWidth }) // 设置产品图宽高 $(\'.middle_img\').css({ width: this.middleImgWidth, height: this.middleImgHeight }) // 设置移动阴影图宽高 $(\'.middle_img .shade\').css({ width: this.middleImgWidth/this.zoom, height: this.middleImgHeight/this.zoom }) // 设置缩略图容器高 $(\'.carousel\').css({ height: this.thumbnailHeight }) // 设置每个缩略图宽 $(\'.picture_item\').css({ width: this.itemWidth }) // 设置放大后图片容器的宽高,left $(\'.right_contanier\').css({ left: this.middleImgWidth, width: imgWidth, height: imgWidth }) // 设置放大图片的宽高(图片的放大倍数) $(\'.right_contanier .big_img\').css({ width: imgWidth * this.zoom, height: imgWidth * this.zoom }) }) }, methods: { // 产品图片鼠标移入事件,显示阴影,显示大图 boxMouseOver (e) { console.log(9999, e) e.preventDefault(); e.stopPropagation(); this.isShade = true this.isBig = true // 计算阴影的位置 let x = e.offsetX - $(\'.shade\').width()/2 let y = e.offsetY - $(\'.shade\').height()/2 let maxLeft = $(\'.middle_img\').width() - $(\'.shade\').width() let maxTop = $(\'.middle_img\').height() - $(\'.shade\').height() x = x <= 0 ? 0 : x x = x >= maxLeft ? maxLeft : x y = y <= 0 ? 0 : y y = y >= maxTop ? maxTop : y
$(\'.shade\').css({
left: x,
top: y
})
}, // 鼠标在阴影移动 shadeMouseMove (e) { e.preventDefault(); e.stopPropagation();
//用页面x - 父盒子的offsetLeft - 父盒子的左边框宽度 标红的两个方法补在下面
var x = this.getEventPage(e).pageX - $(\'.middle_img\')[0].offsetParent.offsetLeft - $(\'.middle_img\')[0].offsetParent.clientLeft;
//用页面y - 父盒子的offsetTop - 父盒子的上边框宽度
var y = this.getEventPage(e).pageY - $(\'.middle_img\')[0].offsetParent.offsetTop - $(\'.middle_img\')[0].offsetParent.clientTop;
//让阴影的坐标居中
x -= $(\'.shade\').width() / 2;
y -= $(\'.shade\').height() / 2;
// 移动边界限制
let maxLeft = $(\'.middle_img\').width() - $(\'.shade\').width()
let maxTop = $(\'.middle_img\').height() - $(\'.shade\').height()
x = x <= 0 ? 0 : x
x = x >= maxLeft ? maxLeft : x
y = y <= 0 ? 0 : y
y = y >= maxTop ? maxTop : y
// 重新赋值当前的定位值
$(\'.shade\').css({
left: x,
top: y
})
// 计算出实时的大图的定位,首先计算出比例 // 比例为x:大图宽度/小图宽度 y: 大图高度/小图高度,将小图的定位乘以比例就是大图的定位 const xRate = $(\'.big_img\').width() / $(\'.middle_img\').width() const yRate = $(\'.big_img\').height() / $(\'.middle_img\').height() $(\'.big_img\').css({ left: -x*xRate, top: -y*yRate }) // console.log(e, x, y, xRate, yRate, 66677) }, // 鼠标移入阴影,去除自定义事件 shadeMouseOver (e) { e.preventDefault(); e.stopPropagation(); // console.log(88888, e) }, // 图片移出隐藏阴影和大图 boxMouseLeave (e) { this.isShade = false this.isBig = false }, // 切换图片 tabPicture (item) { this.middleImg = item.url }, // 点击左边箭头 leftArrowClick () { if (this.middleLeft < 0) { // 每次向右平移一个图片盒子的宽度 this.middleLeft += this.itemWidth $(\'.picture_container\').animate({ left: this.middleLeft }, 500) } }, // 点击右边箭头 rightArrowClick () { // 每次向左平移一个盒子的宽度,最多移动的宽度为(图片数组长度-4)*每张缩略图的宽度 if (this.middleLeft > -this.itemWidth*(this.pictureList.length-4)) { this.middleLeft -= this.itemWidth $(\'.picture_container\').animate({ left: this.middleLeft }, 500) } console.log(this.middleLeft) } } } </script> <style scoped> .magnify { position: relative; } .left_contaner { width: 100%; height: 100%; } .left_contaner .middle_img { border: 1px solid #ccc; box-sizing: border-box; position: relative; } .left_contaner .shade { background-color: rgba( 135,206,235, .5); position: absolute; top: 0; left: 0;
cursor: move;
}
.left_contaner .middle_img img { width: 100%; height: 100%; } .left_contaner .carousel { width: 100%; margin-top: 20px; display: -webkit-flex; } .left_contaner .carousel .show_box { flex: 1; overflow: hidden; position: relative; } .left_contaner .carousel .arrow { flex-basis: 25px; cursor: pointer; } .left_contaner .carousel .left_arrow { background: url(\'http://www.jq22.com/demo/jQuery-fdj201705051102/images/btn_prev.png\') no-repeat; background-position: center center; } .left_contaner .carousel .right_arrow { background: url(\'http://www.jq22.com/demo/jQuery-fdj201705051102/images/btn_next.png\') no-repeat; background-position: center right; } .left_contaner .carousel .picture_container { width: 200%; height: 100%; position: absolute; overflow: hidden; top: 0; left: 0; } .left_contaner .picture_container .picture_item { height: 100%; float: left; padding: 5px; box-sizing: border-box; } .left_contaner .picture_container .picture_item:hover { border: 2px solid #f2019f; } .left_contaner .picture_container .picture_item img { width: 100%; height: 100%; } .right_contanier { overflow: hidden; position: absolute; top: 0; border: 1px solid #ccc; } .right_contanier .big_img { position: absolute; top: 0px; left: 0px; } </style>
之前漏了两个方法,补在下面,放在methods方法里就好了
/** * 获取网页滚出去的距离(包括上面滚出去的部分和左边滚出去的部分) * @returns {{scrollTop: (Number|number), scrollLeft: (Number|number)}} */ getPageScroll() { return { scrollTop: window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop || 0, scrollLeft: window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft || 0 } }, /** * 获取事件对象点击的点,相对于文档左上角的坐标 * @param e * @returns {{pageX: *, pageY: *}} */ getEventPage(e) { return { pageX: e.clientX + this.getPageScroll().scrollLeft, pageY: e.clientY + this.getPageScroll().scrollTop } }
父组件引用
<template>
<div id="app">
<img alt="Vue logo" src="./assets/logo.png">
<!-- 图片放大镜,需要自定义图片的宽高在这里传入,组件有设置默认的宽高,不传也可以 -->
<magnifier></magnifier>
</div>
</template>
<script>
// 引入放大镜组件
import Magnifier from \'./components/magnifier.vue\'
import $ from \'jquery\'
export default {
name: \'app\',
components: {
// 注册
Magnifier
}
}
git-hup地址: https://github.com/shengbid/vue-demo 这个文件是平时练习的项目,里面还有一些我写的其他博客的源码,有需要可以下载看看