Vue项目图片剪切上传——vue-cropper的使用

npm install vue-cropper --save-dev

<template> ?<div style="display:flex;"> ???<div class="info-item" style="flex:1;"> ?????<div style="width:120px;height:120px;border-radius:50%;overflow:hidden;margin-left:123px;border:1px solid #ddd"> ???????<img style="width:120px;height:120px;" :src="headImg" alt="头像"> ?????</div> ???</div> ???<div class="info-item" style="flex:1;margin-left:-160px;margin-top:30px;"> ?????<label class="btn btn-orange" for="uploads" style="display:inline-block;width: 70px;padding: 0;text-align: center;line-height: 28px;">选择图片</label> ?????<input type="file" id="uploads" :value="imgFile" style="position:absolute; clip:rect(0 0 0 0);" accept="image/png, image/jpeg, image/gif, image/jpg" @change="uploadImg($event, 1)"> ?????<input type="button" class="oper" style="height:20px;width:23px;font-size:20px;margin:3px 5px;" value="+" title="放大" @click="changeScale(1)"> ?????<input type="button" class="oper" style="height:20px;width:23px;font-size:20px;margin:3px 5px;" value="-" title="缩小" @click="changeScale(-1)"> ?????<input type="button" class="oper" style="height:20px;width:23px;font-size:20px;margin:3px 5px;" value="?" title="左旋转" @click="rotateLeft"> ?????<input type="button" class="oper" style="height:20px;width:23px;font-size:20px;margin:3px 5px;" value="?" title="右旋转" @click="rotateRight"> ?????<input type="button" class="oper" style="height:20px;width:23px;font-size:20px;margin:3px 5px;" value="↓" title="下载" @click="down(‘blob‘)"> ?????<input type="button" class="btn btn-blue" value="上传头像" @click="finish(‘blob‘)"> ?????<div class="line" style="margin-left: -280px;margin-top: 85px;"> ???????<div class="cropper-content" style="margin-top:-60px;margin-left:260px;"> ?????????<div class="cropper"> ???????????<vueCropper ?????????????ref="cropper" ?????????????:img="option.img" ?????????????:outputSize="option.size" ?????????????:outputType="option.outputType" ?????????????:info="true" ?????????????:full="option.full" ?????????????:canMove="option.canMove" ?????????????:canMoveBox="option.canMoveBox" ?????????????:original="option.original" ?????????????:autoCrop="option.autoCrop" ?????????????:autoCropWidth="option.autoCropWidth" ?????????????:autoCropHeight="option.autoCropHeight" ?????????????:fixedBox="option.fixedBox" ?????????????@realTime="realTime" ?????????????@imgLoad="imgLoad" ???????????></vueCropper> ?????????</div> ?????????<div style="margin-left:20px;"> ???????????<div class="show-preview" :style="{‘width‘: ‘150px‘, ‘height‘:‘155px‘, ?‘overflow‘: ‘hidden‘, ‘margin‘: ‘5px‘}"> ?????????????<div :style="previews.div" class="preview"> ???????????????<img :src="previews.url" :style="previews.img"> ?????????????</div> ???????????</div> ?????????</div> ???????</div> ?????</div> ???</div> ?</div></template><script> ?import VueCropper from ‘vue-cropper‘ ?import Api from ‘@/js/api.js‘ //接口url配置文件 ?export default { ???data() { ?????return { ???????headImg:‘‘, ???????//剪切图片上传 ???????crap: false, ???????previews: {}, ???????option: { ?????????img: ‘‘, ?????????outputSize:1, //剪切后的图片质量（0.1-1） ?????????full: false,//输出原图比例截图 props名full ?????????outputType: ‘png‘, ?????????canMove: true, ??????????original: false, ??????????canMoveBox: true, ??????????autoCrop: true, ??????????autoCropWidth: 150, ??????????autoCropHeight: 150, ??????????fixedBox: true ????????}, ????????fileName:‘‘, ?//本机文件地址 ???????downImg: ‘#‘, ???????imgFile:‘‘, ???????uploadImgRelaPath:‘‘, //上传后的图片的地址（不带服务器域名） ?????} ???}, ???components: { ??????VueCropper ????}, ????methods: { ??????//放大/缩小 ?????changeScale(num) { ????????console.log(‘changeScale‘) ???????num = num || 1; ????????this.$refs.cropper.changeScale(num); ??????}, ??????//坐旋转 ?????rotateLeft() { ????????console.log(‘rotateLeft‘) ???????this.$refs.cropper.rotateLeft(); ??????}, ??????//右旋转 ?????rotateRight() { ????????console.log(‘rotateRight‘) ???????this.$refs.cropper.rotateRight(); ??????}, ??????//上传图片（点击上传按钮） ?????finish(type) { ????????console.log(‘finish‘) ???????let _this = this; ???????let formData = new FormData(); ???????// 输出 ????????if (type === ‘blob‘) { ??????????this.$refs.cropper.getCropBlob((data) => { ????????????let img = window.URL.createObjectURL(data) ????????????this.model = true; ????????????this.modelSrc = img; ????????????formData.append("file", data, this.fileName); ???????????this.$http.post(Api.uploadSysHeadImg.url, formData, {contentType: false, processData: false, headers:{‘Content-Type‘: ‘application/x-www-form-urlencoded‘}}) ???????????.then((response)=>{ ?????????????var res = response.data; ?????????????if(res.success == 1){ ???????????????$(‘#btn1‘).val(‘‘); ???????????????_this.imgFile = ‘‘; ???????????????_this.headImg = res.realPathList[0]; ?//完整路径 ???????????????_this.uploadImgRelaPath = res.relaPathList[0]; ?//非完整路径 ???????????????_this.$message({　　//element-ui的消息Message消息提示组件 ?????????????????type: ‘success‘, ?????????????????message: ‘上传成功‘ ???????????????}); ?????????????} ???????????}) ?????????}) ????????} else { ??????????this.$refs.cropper.getCropData((data) => { ????????????this.model = true; ????????????this.modelSrc = data; ??????????}) ????????} ??????}, ??????// 实时预览函数 ??????realTime(data) { ????????console.log(‘realTime‘) ???????this.previews = data ??????}, ??????//下载图片 ?????down(type) { ????????console.log(‘down‘) ???????var aLink = document.createElement(‘a‘) ????????aLink.download = ‘author-img‘ ????????if (type === ‘blob‘) { ??????????this.$refs.cropper.getCropBlob((data) => { ????????????this.downImg = window.URL.createObjectURL(data) ???????????aLink.href = window.URL.createObjectURL(data) ????????????aLink.click() ??????????}) ????????} else { ??????????this.$refs.cropper.getCropData((data) => { ????????????this.downImg = data; ???????????aLink.href = data; ????????????aLink.click() ??????????}) ????????} ??????}, ??????//选择本地图片 ?????uploadImg(e, num) { ????????console.log(‘uploadImg‘); ???????var _this = this; ???????//上传图片 ????????var file = e.target.files[0] ????????_this.fileName = file.name; ???????if (!/\.(gif|jpg|jpeg|png|bmp|GIF|JPG|PNG)$/.test(e.target.value)) { ??????????alert(‘图片类型必须是.gif,jpeg,jpg,png,bmp中的一种‘) ??????????return false ????????} ????????var reader = new FileReader(); ????????reader.onload =(e) => { ??????????let data; ??????????if (typeof e.target.result === ‘object‘) { ????????????// 把Array Buffer转化为blob 如果是base64不需要 ????????????data = window.URL.createObjectURL(new Blob([e.target.result])) ??????????} ??????????else { ????????????data = e.target.result ??????????} ?????????if (num === 1) { ????????????_this.option.img = data ??????????} else if (num === 2) { ????????????_this.example2.img = data ??????????} ????????} ????????// 转化为base64 ????????// reader.readAsDataURL(file) ????????// 转化为blob ????????reader.readAsArrayBuffer(file); ?????????????}, ??????imgLoad (msg) { ????????console.log(‘imgLoad‘) ???????console.log(msg) ??????} ???}, ??????}</script><style lang="less"> ?.info { ???width: 720px; ???margin: 0 auto; ???.oper-dv { ?????height:20px; ?????text-align:right; ?????margin-right:100px; ?????a { ???????font-weight: 500; ???????&:last-child { ?????????margin-left: 30px; ???????} ?????} ???} ???.info-item { ?????margin-top: 15px; ?????label { ???????display: inline-block; ???????width: 100px; ???????text-align: right; ?????} ?????.sel-img-dv { ???????position: relative; ???????.sel-file { ?????????position: absolute; ?????????width: 90px; ?????????height: 30px; ?????????opacity: 0; ?????????cursor: pointer; ?????????z-index: 2; ???????} ???????.sel-btn { ?????????position: absolute; ?????????cursor: pointer; ?????????z-index: 1; ???????} ?????} ???} ?} ?.cropper-content{ ???display: flex; ???display: -webkit-flex; ???justify-content: flex-end; ???-webkit-justify-content: flex-end; ???.cropper{ ?????width: 260px; ?????height: 260px; ???} ???.show-preview{ ?????flex: 1; ?????-webkit-flex: 1; ?????display: flex; ?????display: -webkit-flex; ?????justify-content: center; ?????-webkit-justify-content: center; ?????.preview{ ???????overflow: hidden; ???????border-radius: 50%; ???????border:1px solid #cccccc; ???????background: #cccccc; ???????margin-left: 40px; ?????} ???} ?} ?.cropper-content .show-preview .preview {margin-left: 0;} </style>