一个手写的vue放大镜效果

组件使用less，请确保已安装loader本组件为放大镜组件，传参列表为:•width:必传，设置放

组件使用less，请确保已安装loader

本组件为放大镜组件，传参列表为:

•width: 必传，设置放大镜的宽高(正方形)，放大区域等同，放大倍数为2倍

•picList:必传，传入图片列表

使用示例:

script:

import mirror from 'xx/mirror'
 export default {
 components:{
 mirror
 },
 data(){
 return {
 width:300,
 picList:[
 xxxxxx,
 xxxxxx
 ],
 }
 }
 }

html:

<mirror :width="width" :picList="picList" /> 

详细代码:

HTML:

<template>
 <div class="mirror">
 <div class="wrap" :style="{width:width+'px',height:width+'px'}" >
 <div ref="truth" :style="{width:'100%',height:'100%'}" @mousemove="move" @mouseenter="showMagnify" @mouseleave="hideMagnify">
 <div class="mask" ref="mask" v-show = "showMask" :style="{width:width/2+'px',height:width/2+'px',left:maskPosition.x+'px',top:maskPosition.y+'px'}"></div>
 <img :src="picList[picIndex]" draggable="false"/>
 </div>
 <div class="virtual" ref="virtual" v-if = "isShowVirtual" :style="{width:width+'px',height:width+'px'}" >
 <div class="big" ref = "bigPic" :style="{position:'absolute',width:2*width+'px',height:2*width+'px',backgroundSize:'100% 100%',backgroundImage:`url(${picList[picIndex]})`,left:percent.x, top:percent.y}" >
 </div>
 </div>
 </div>
 <ul class="picList" :style="{width:width+'px'}">
 <li v-for = "(item,index) in picList" :class="{now:index==picIndex}" :data-index="index" :key ="item" @mouseenter="changeIndex">
 <img :src ="item" />
 </li>
 </ul>
 </div>
</template>

JS:

 export default {
 props:['width','picList'],//宽度是用来给放大镜的
 data(){
 return {
 picIndex:0,
 isShowVirtual:false,
 showMask:false,
 maskPosition:{},
 percent:{},
 }
 },
 methods:{
 computedOffset(obj,prop){ //计算元素到body的绝对位置
 if(obj==document.body || obj.offsetParent == document.body){
 return parseInt(obj[prop])
 }
 return parseInt(obj[prop])+this.computedOffset(obj.offsetParent,prop)
 },
 changeIndex(e){
 this.picIndex = e.target.dataset.index
 },
 showMagnify(e){
 this.showMask=true;
 this.isShowVirtual = true;
 },
 hideMagnify(){
 this.isShowVirtual=false;
 this.showMask=false
 },
 computePosition(e){
 let x = e.pageX,y = e.pageY;
 let mask = this.$refs.mask;
 let truth = this.$refs.truth;
 let virtual = this.$refs.virtual;
 let bigPic = this.$refs.bigPic;
 x = x-this.computedOffset(truth,'offsetLeft') -mask.offsetWidth/2;
 y = y-this.computedOffset(truth,'offsetTop')- mask.offsetHeight/2;
 if(x<=0) {
 x=0
 }else if(x>truth.offsetWidth - mask.offsetWidth){
 x = truth.offsetWidth/2
 }
 if(y<=0){
 y=0;
 }
 else if(y>truth.offsetHeight - mask.offsetHeight){
 y = truth.offsetHeight/2
 }

 this.maskPosition = {
 x,y
 }
 //计算比例
 this.percent={
 x:-x/(truth.offsetWidth-mask.offsetWidth)*(bigPic.offsetWidth - virtual.offsetWidth)+'px',
 y:-y/(truth.offsetHeight-mask.offsetHeight)*(bigPic.offsetHeight - virtual.offsetHeight)+'px'
 }
 },
 move(e){
 this.computePosition(e)
 }
 }
 }

CSS:

<style lang="less" scoped>
.now{
 border-color: cyan !important;
}
 .mirror{
 width:100%;
 .wrap{
 user-select: none;
 margin-bottom: 20px;
 position: relative;
 background-color: #fff;
 border:1px solid gray;
 box-sizing:border-box;
 cursor: pointer;
 img{
 width:100%;
 height:100%;
 }
 .virtual{
 overflow:hidden;
 width:100%;
 height:100%;
 position:absolute;
 left:calc(100% + 10px);
 top:0;
 background-repeat:no-repeat
 }
 .mask{
 position: absolute;
 background-image: url('https://img-tmdetail.alicdn.com/tps/i4/T12pdtXaldXXXXXXXX-2-2.png');
 background-repeat:repeat;
 cursor: move;
 }
 }
 .picList{
 width:100%;
 display: flex;
 justify-content: space-between;
 flex-wrap:wrap;
 li{
 width:50px;
 height:50px;
 margin:5px;
 border:1px solid transparent;
 box-sizing: border-box;
 img{
 width:100%;
 height:100%
 }
 }
 }
 .picList:after{
 content:"";
 flex:auto;
 }
 }
</style>

可直接复制文件内容至项目使用，文件地址：https://blog-static.cnblogs.com/files/hhyf/mirror.vue.js

效果

总结

以上所述是小编给大家介绍的一个手写的vue放大镜效果,希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！ 如果你觉得本文对你有帮助，欢迎转载，烦请注明出处，谢谢！

vue放大镜