vue-cropper的装置
npm install vue-cropper或yarn add vue-cropper只须要一个图片地址和一个导出截取后图片的办法，vue-cropper在截取图片后会返回一个图片的base64数据。
<template> <div class="cropper-content"> <div class="cropper-box"> <div class="cropper"> <vue-cropper ref="cropper" :img="option.img" :outputSize="option.outputSize" :outputType="option.outputType" :info="option.info" :canScale="option.canScale" :autoCrop="option.autoCrop" :autoCropWidth="option.autoCropWidth" :autoCropHeight="option.autoCropHeight" :fixed="option.fixed" :fixedNumber="option.fixedNumber" :full="option.full" :fixedBox="option.fixedBox" :canMove="option.canMove" :canMoveBox="option.canMoveBox" :original="option.original" :centerBox="option.centerBox" :height="option.height" :infoTrue="option.infoTrue" :maxImgSize="option.maxImgSize" :enlarge="option.enlarge" :mode="option.mode" @realTime="realTime" @imgLoad="imgLoad" > </vue-cropper> </div> <!--底部操作工具按钮--> <div class="footer-btn"> <div class="scope-btn"> <label class="btn" for="uploads">抉择封面</label> <input type="file" id="uploads" style="position: absolute; clip: rect(0 0 0 0)" accept="image/png, image/jpeg, image/gif, image/jpg" @change="selectImg($event)" /> <el-button size="mini" type="danger" plain icon="el-icon-zoom-in" @click="changeScale(1)" >放大</el-button > <el-button size="mini" type="danger" plain icon="el-icon-zoom-out" @click="changeScale(-1)" >放大</el-button > <el-button size="mini" type="danger" plain @click="rotateLeft" >左旋转</el-button > <el-button size="mini" type="danger" plain @click="rotateRight" >右旋转</el-button > </div> <div class="upload-btn"> <el-button size="mini" type="success" @click="uploadImg('blob')" >上传封面 <i class="el-icon-upload"></i ></el-button> </div> </div> </div> <!--预览效果图--> <div class="show-preview"> <div :style="previews.div" class="preview"> <img :src="previews.url" :style="previews.img" /> </div> </div> </div></template><script>import { VueCropper } from 'vue-cropper';export default { name: 'CropperImage', components: { VueCropper }, props: ['Name'], data() { return { name: this.Name, previews: {}, option: { img: '', //裁剪图片的地址 outputSize: 1, //裁剪生成图片的品质(可选0.1 - 1) outputType: 'jpeg', //裁剪生成图片的格局（jpeg || png || webp） info: true, //图片大小信息 canScale: true, //图片是否容许滚轮缩放 autoCrop: true, //是否默认生成截图框 autoCropWidth: 230, //默认生成截图框宽度 autoCropHeight: 150, //默认生成截图框高度 fixed: true, //是否开启截图框宽高固定比例 fixedNumber: [1.53, 1], //截图框的宽高比例 full: false, //false按原比例裁切图片，不失真 fixedBox: true, //固定截图框大小，不容许扭转 canMove: false, //上传图片是否能够挪动 canMoveBox: true, //截图框是否拖动 original: false, //上传图片依照原始比例渲染 centerBox: false, //截图框是否被限度在图片外面 height: true, //是否依照设施的dpr 输入等比例图片 infoTrue: false, //true为展现实在输入图片宽高，false展现看到的截图框宽高 maxImgSize: 3000, //限度图片最大宽度和高度 enlarge: 1, //图片依据截图框输入比例倍数 mode: '230px 150px' //图片默认渲染形式 } }; }, methods: { //初始化函数 imgLoad(msg) { console.log('工具初始化函数=====' + msg); }, //图片缩放 changeScale(num) { num = num || 1; this.$refs.cropper.changeScale(num); }, //向左旋转 rotateLeft() { this.$refs.cropper.rotateLeft(); }, //向右旋转 rotateRight() { this.$refs.cropper.rotateRight(); }, //实时预览函数 realTime(data) { this.previews = data; }, //抉择图片 selectImg(e) { let file = e.target.files[0]; if (!/\.(jpg|jpeg|png|JPG|PNG)$/.test(e.target.value)) { this.$message({ message: '图片类型要求：jpeg、jpg、png', type: 'error' }); return false; } //转化为blob let reader = new FileReader(); reader.onload = (e) => { let data; if (typeof e.target.result === 'object') { data = window.URL.createObjectURL(new Blob([e.target.result])); } else { data = e.target.result; } // 赋值抉择图片的地址 this.option.img = data; }; //转化为base64 reader.readAsDataURL(file); }, //上传图片 uploadImg(type) { let _this = this; if (type === 'blob') { //获取截图的blob数据 this.$refs.cropper.getCropBlob(async (data) => { let formData = new FormData(); }); } } }};</script><style scoped lang="scss">.cropper-content { display: flex; display: -webkit-flex; justify-content: flex-end; .cropper-box { flex: 1; width: 100%; .cropper { width: auto; height: 300px; } } .show-preview { flex: 1; -webkit-flex: 1; display: flex; display: -webkit-flex; justify-content: center; .preview { overflow: hidden; border: 1px solid #67c23a; background: #cccccc; } }}.footer-btn { margin-top: 30px; display: flex; display: -webkit-flex; justify-content: flex-end; .scope-btn { display: flex; display: -webkit-flex; justify-content: space-between; padding-right: 10px; } .upload-btn { flex: 1; -webkit-flex: 1; display: flex; display: -webkit-flex; justify-content: center; } .btn { outline: none; display: inline-block; line-height: 1; white-space: nowrap; cursor: pointer; -webkit-appearance: none; text-align: center; -webkit-box-sizing: border-box; box-sizing: border-box; outline: 0; -webkit-transition: 0.1s; transition: 0.1s; font-weight: 500; padding: 8px 15px; font-size: 12px; border-radius: 3px; color: #fff; background-color: #409eff; border-color: #409eff; margin-right: 10px; }}</style>预览效果图：
罕用api属性形容：
img: '', //裁剪图片的地址 outputSize: 1, //裁剪生成图片的品质(可选0.1 - 1) outputType: 'jpeg', //裁剪生成图片的格局（jpeg || png || webp） info: true, //图片大小信息 canScale: true, //图片是否容许滚轮缩放 autoCrop: true, //是否默认生成截图框 autoCropWidth: 230, //默认生成截图框宽度 autoCropHeight: 150, //默认生成截图框高度 fixed: true, //是否开启截图框宽高固定比例 fixedNumber: [1.53, 1], //截图框的宽高比例 full: false, //false按原比例裁切图片，不失真 fixedBox: true, //固定截图框大小，不容许扭转 canMove: false, //上传图片是否能够挪动 canMoveBox: true, //截图框是否拖动 original: false, //上传图片依照原始比例渲染 centerBox: false, //截图框是否被限度在图片外面 height: true, //是否依照设施的dpr 输入等比例图片 infoTrue: false, //true为展现实在输入图片宽高，false展现看到的截图框宽高 maxImgSize: 3000, //限度图片最大宽度和高度 enlarge: 1, //图片依据截图框输入比例倍数 mode: '230px 150px' //图片默认渲染形式