vue.js實現雙擊放大預覽功能
阿新 • • 發佈:2020-06-24
本文例項為大家分享了vue.js實現雙擊放大預覽的具體程式碼,供大家參考,具體內容如下
imgPreview元件
<template> <div class="vue-uploader" @keyup.esc.native="hide"> <div v-if="visible" @click.self="hide" class="img_model" > <div class="img-btn btn-pre" @click="preImg" v-show="imgList.length>1"><i class="el-icon-arrow-left"></i></div> <div class="img-btn btn-next" @click="nextImg" v-show="imgList.length>1"><i class="el-icon-arrow-right"></i></div> <div class="center-box"> <div class="img_box" v-bind:style="{ transform: 'rotate(' + deg + 'deg)' }"> <img :src="imgList[imgIndex]" alt="vue.js實現雙擊放大預覽功能" id="oImg" @click="e=>e.stopPropagation()" v-bind:style="{ zoom: zoom }"> </div> </div> <div @click="e=>e.stopPropagation()" class="btns"> <img src="https://static-frontpicture.lexing360.com/min.png" @click="imgToSize(false)"> <img src="https://static-frontpicture.lexing360.com/rotate.png" @click="rotate"> <img src="https://static-frontpicture.lexing360.com/plus.png" @click="imgToSize(true)"> </div> </div> </div> </template> <script> export default { props: { initImgIndex: { required: true },imgList: { required: true,},visible: { required: true },data() { return { src: '',pasteText: '',zoom: '100%',imgIndex: 0,deg: 0,firstTag: true } },created () { this.imgIndex = this.initImgIndex },watch: { visible(val) { this.imgIndex = this.initImgIndex this.zoom = '100%' this.firstTag = true this.$emit('update:visible',val); if (val) { this.$emit('open'); } else { this.$el.removeEventListener('scroll',this.updatePopper); this.$emit('close'); } } },methods: { imgToSize(oBool) { if (this.firstTag && !oBool && document.getElementById('oImg') && document.getElementById('oImg').naturalWidth > window.innerWidth) { this.zoom = parseInt(window.innerWidth * 0.9 / document.getElementById('oImg').naturalWidth * 100) + '%' this.firstTag = false } if ((document.getElementById('oImg').width * parseInt(this.zoom) / 100 <= 200 || this.zoom == '2%') && !oBool) { this.$message.info('已經最小了!') return } if (document.getElementById('oImg') && document.getElementById('oImg').x <= window.innerWidth * 0.05 && oBool) { this.$message.info('已經最大了!') return } this.zoom = parseInt(this.zoom) + (oBool ? 2 : -2) + '%'; },rotate () { this.deg += 90 },nextImg (e) { e.stopPropagation() if (this.imgIndex == this.imgList.length-1) { this.imgIndex = 0 } else { this.imgIndex ++ } },preImg(e) { e.stopPropagation() if (this.imgIndex == 0) { this.imgIndex = this.imgList.length - 1 } else { this.imgIndex -- } },hide (cancel) { if (cancel !== false) { this.$emit('update:visible',false); this.$emit('visible-change',false); } },} } </script> <style> .img_model{ position: fixed; width: 100%; min-height: 100%; background: rgba(0,.5); top: 0; left: 0; z-index: 9999; /* text-align: center; */ display: flex; flex-direction: column; justify-content: center; align-items: center; } .center-box { position: relative; max-width: 90%; } .img_model .img_box { max-width: 100%; max-height: 800px; overflow-y: scroll; } .img_model .img_box::-webkit-scrollbar { display: none; } .img_model .img_box img{ max-width: 100%; } .img_model .img-btn { position: absolute; top: 50%; transform: translateY(-50%); z-index: 100; width: 50px; height: 70px; font-size: 30px; line-height: 70px; text-align: center; background: rgba(255,255,.3); color: #FFF; } .img_model .btn-pre { left: 5%; } .img_model .btn-next { right: 5%; } .img_model .img_box .btn-next { right: 20rpx; } .img_model .btns{ position: fixed; bottom: 25px; -webkit-user-select:none; -moz-user-select:none; -ms-user-select:none; user-select:none; } </style>
引入這個元件
import imgPreview from './imgPreview' data:{ return{ bigImgShow: false,bigImgIndex:'',imgList:[],} } components: { imgPreview },method:{ previewImage (imgList,index) { if (imgList) { this.imgList = imgList this.bigImgIndex = index this.bigImgShow = true } },}
template裡面渲染
<imgPreview :visible.sync="bigImgShow" :initImgIndex="bigImgIndex" :imgList="imgList"></imgPreview>
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