小编给大家分享一下vue-cropper插件如何实现图片截取上传组件封装,希望大家阅读完这篇文章之后都有所收获,下面让我们一起去探讨吧!
后台开发需要上传图片并进行相应比例尺寸图片的截取,本组件开发采用Ant Design Vue组件库搭配vue-cropper插件进行封装
实现如下
html
<template> <div> <a-upload name="avatar" list-type="picture-card" class="avatar-uploader" :show-upload-list="false" :custom-request="customRequest" :before-upload="beforeUpload" : > <img v-if="imageUrl && !loading" :src="imageUrl" alt="avatar" : /> <div v-else> <a-icon :type="loading ? 'loading' : 'plus'" /> <div class="ant-upload-text">上传图片</div> </div> </a-upload> <a-modal v-model="imageCut.isShowModal" title="图片截取" width="400px" @ok="finish" @cancel="imageCut.close" > <div class="cropper-content" v-if="imageCut.isShowModal"> <div class="cropper" > <vueCropper ref="cropper" :img="imageCut.imgFile" :outputSize="outputSize" :outputType="outputType" :info="info" :full="full" :canMove="canMove" :canMoveBox="canMoveBox" :original="original" :autoCrop="autoCrop" :fixed="fixed" :fixedNumber="fixedNumber" :centerBox="centerBox" :infoTrue="infoTrue" :fixedBox="fixedBox" ></vueCropper> </div> </div> </a-modal> </div> </template>
js
<script> import { uploadImage } from '@/api/common' import { VueCropper } from "vue-cropper"; export default { name: 'ImageUpload', components: { VueCropper }, data() { return { loading: false, imageCut: { isShowModal: false, imgFile: '', init: imgFile => { this.imageCut.imgFile = imgFile this.imageCut.isShowModal = true }, close: () => { this.imageCut.imgFile = '' this.imageCut.isShowModal = false } } } }, props: { imageUrl: String, width: { type: String, default: '100px' }, height: { type: String, default: '100px' }, canCut: { type: Boolean, default: false }, info: { type: Boolean, default: false }, // 裁剪框的大小信息 outputSize: { type: Number, default: 0.8 }, // 裁剪生成图片的质量 outputType: { type: String, default: 'jpeg' }, // 裁剪生成图片的格式 canScale: { type: Boolean, default: true }, // 图片是否允许滚轮缩放 autoCrop: { type: Boolean, default: true }, // 是否默认生成截图框 // autoCropWidth: 300, // 默认生成截图框宽度 // autoCropHeight: 200, // 默认生成截图框高度 fixedBox: { type: Boolean, default: false }, // 固定截图框大小 不允许改变 fixed: { type: Boolean, default: true }, // 是否开启截图框宽高固定比例 fixedNumber: { type: Array, default: () => [1, 1] }, // 截图框的宽高比例 full: { type: Boolean, default: true }, // 是否输出原图比例的截图 canMove: { type: Boolean, default: false }, canMoveBox: { type: Boolean, default: true }, // 截图框能否拖动 original: { type: Boolean, default: false }, // 上传图片按照原始比例渲染 centerBox: { type: Boolean, default: true }, // 截图框是否被限制在图片里面 infoTrue: { type: Boolean, default: true } // true 为展示真实输出图片宽高 false 展示看到的截图框宽高 }, methods: { beforeUpload(file) { const isJpgOrPng = file.type === 'image/jpeg' || file.type === 'image/png' if (!isJpgOrPng) { this.$message.error('请上传JPG或PNG文件!') } const isLt2M = file.size / 1024 / 1024 < 2 if (!isLt2M) { this.$message.error('请上传2MB以下文件!') } return isJpgOrPng && isLt2M }, customRequest(file) { if (this.canCut) { this.readFile(file.file) } else { this.loading = true const formData = new FormData() formData.append('fileIdcard', file.file) uploadImage(formData).then(res => { this.loading = false this.$emit('uploadSuccess', res.ossUrl) }) } }, readFile(file) { var reader = new FileReader() reader.readAsDataURL(file) reader.onload = () => { this.imageCut.init(reader.result) } }, finish() { this.$refs.cropper.getCropBlob(data => { this.loading = true // 上传阿里云服务器 const formData = new FormData() formData.append('fileIdcard', data) uploadImage(formData).then(res => { this.imageCut.close() this.loading = false this.$emit('uploadSuccess', res.ossUrl) }) }) } } } </script>
css
<style lang="less"> .avatar-uploader > .ant-upload { width: 100%; height: 100%; } .ant-upload-select-picture-card i { font-size: 32px; color: #999; } .ant-upload-select-picture-card .ant-upload-text { margin-top: 8px; color: #666; } .cropper-content { .cropper { width: auto; height: 400px; } } </style>
组件使用及说明
<image-upload :imageUrl="form.diagramUrl" @uploadSuccess="uploadSuccess" width="160px" height="90px" :can-edit="canCut" :fixed-number="[16,9]" />
组件调用时需传入canEdit属性,指定组件是否启动图片选取后的裁剪功能,默认值为不启用裁剪;需裁剪时可传入fixedNumber属性,定义裁剪框的宽高比
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