vue-cli结合Element-ui基于cropper.js封装vue实现图片裁剪组件功能

<template>
 <div class="modal-dialog modal-lg" :id="id">
 <div class="modal-content">
  <form class="avatar-form" enctype="multipart/form-data" method="post">
  <div class="modal-header">
  </div>
  <div class="modal-body">
   <div class="avatar-body">
   <!-- Upload image and data -->
   <div class="avatar-upload">
    <input type="hidden" class="avatar-src" name="avatar_src">
    <input type="hidden" class="avatar-data" name="ci">
    <label for="avatarInput" class="el-button el-button--primary">选择图片</label>
    <input type="file" class="avatar-input " style="visibility: hidden" id="avatarInput" name="file">
   </div>
   <!-- Crop and preview -->
   <el-row>
    <el-col :span="18">
    <div class="avatar-wrapper"></div>
    </el-col>
    <el-col :span="6" style="overflow: hidden;">
    <div style="padding-left: 10px">
     <div class="avatar-preview preview-lg" ></div>
     <div class="avatar-preview avatar-preview-round preview-md"></div>
    <!--<div class="avatar-preview preview-sm"></div>-->
    </div>
    </el-col>
   </el-row>
   <el-row class="avatar-btns">
    <el-col :span="18">
    <el-button-group>
     <button type="primary" class="el-button el-button--primary" data-method="rotate" data-option="-180" title="Rotate -180 degrees">-180deg</button>
     <button type="primary" class="el-button el-button--primary" data-method="rotate" data-option="-90" title="Rotate -90 degrees">-90deg</button>
     <button type="primary" class="el-button el-button--primary" data-method="rotate" data-option="-45" title="Rotate -45 degrees">-45deg</button>
     <button type="primary" class="el-button el-button--primary" data-method="rotate" data-option="45" title="Rotate 45 degrees">45deg</button>
     <button type="primary" class="el-button el-button--primary" data-method="rotate" data-option="90" title="Rotate 90 degrees">90deg</button>
     <button type="primary" class="el-button el-button--primary" data-method="rotate" data-option="180" title="Rotate 180 degrees">180deg</button>
    </el-button-group>
    </el-col>
    <el-col :span="6"></el-col>
   </el-row>
   <el-row>
    <!--<button type="submit" class="btn btn-primary btn-block avatar-save">裁取</button>-->
   </el-row>
   </div>
  </div>
  </form>
 </div>
 </div>
</template>

<style rel="stylesheet/scss" lang='scss' scoped>
 /*@import "cropper/dist/cropper.css";*/
 /*!
 * Cropper v3.1.3
 * https://github.com/fengyuanchen/cropper
 *
 * Copyright (c) 2014-2017 Chen Fengyuan
 * Released under the MIT license
 *
 * Date: 2017-10-21T10:03:37.133Z
 */
 .avatar-wrapper{
 width: 100%;
 height: 100%;
 overflow: hidden;
 }
 .cropper-container {
 direction: ltr;
 font-size: 0;
 line-height: 0;
 position: relative;
 -ms-touch-action: none;
 touch-action: none;
 -webkit-user-select: none;
 -moz-user-select: none;
 -ms-user-select: none;
 user-select: none;
 }
 .cropper-container img {/*Avoid margin top issue (Occur only when margin-top <= -height)
 */
 display: block;
 height: 100%;
 image-orientation: 0deg;
 max-height: none !important;
 max-width: none !important;
 min-height: 0 !important;
 min-width: 0 !important;
 width: 100%;
 }
 .cropper-wrap-box,
 .cropper-canvas,
 .cropper-drag-box,
 .cropper-crop-box,
 .cropper-modal {
 bottom: 0;
 left: 0;
 position: absolute;
 right: 0;
 top: 0;
 }
 .cropper-wrap-box,
 .cropper-canvas {
 overflow: hidden;
 }
 .cropper-drag-box {
 background-color: #fff;
 opacity: 0;
 }
 .cropper-modal {
 background-color: #000;
 opacity: .5;
 }
 .cropper-view-box {
 display: block;
 height: 100%;
 outline-color: rgba(51, 153, 255, 0.75);
 outline: 1px solid #39f;
 overflow: hidden;
 width: 100%;
 }
 .cropper-dashed {
 border: 0 dashed #eee;
 display: block;
 opacity: .5;
 position: absolute;
 }
 .cropper-dashed.dashed-h {
 border-bottom-width: 1px;
 border-top-width: 1px;
 height: 33.33333%;
 left: 0;
 top: 33.33333%;
 width: 100%;
 }
 .cropper-dashed.dashed-v {
 border-left-width: 1px;
 border-right-width: 1px;
 height: 100%;
 left: 33.33333%;
 top: 0;
 width: 33.33333%;
 }
 .cropper-center {
 display: block;
 height: 0;
 left: 50%;
 opacity: .75;
 position: absolute;
 top: 50%;
 width: 0;
 }
 .cropper-center:before,
 .cropper-center:after {
 background-color: #eee;
 content: ' ';
 display: block;
 position: absolute;
 }
 .cropper-center:before {
 height: 1px;
 left: -3px;
 top: 0;
 width: 7px;
 }
 .cropper-center:after {
 height: 7px;
 left: 0;
 top: -3px;
 width: 1px;
 }
 .cropper-face,
 .cropper-line,
 .cropper-point {
 display: block;
 height: 100%;
 opacity: .1;
 position: absolute;
 width: 100%;
 }
 .cropper-face {
 background-color: #fff;
 left: 0;
 top: 0;
 }
 .cropper-line {
 background-color: #39f;
 }
 .cropper-line.line-e {
 cursor: e-resize;
 right: -3px;
 top: 0;
 width: 5px;
 }
 .cropper-line.line-n {
 cursor: n-resize;
 height: 5px;
 left: 0;
 top: -3px;
 }
 .cropper-line.line-w {
 cursor: w-resize;
 left: -3px;
 top: 0;
 width: 5px;
 }
 .cropper-line.line-s {
 bottom: -3px;
 cursor: s-resize;
 height: 5px;
 left: 0;
 }
 .cropper-point {
 background-color: #39f;
 height: 5px;
 opacity: .75;
 width: 5px;
 }
 .cropper-point.point-e {
 cursor: e-resize;
 margin-top: -3px;
 right: -3px;
 top: 50%;
 }
 .cropper-point.point-n {
 cursor: n-resize;
 left: 50%;
 margin-left: -3px;
 top: -3px;
 }
 .cropper-point.point-w {
 cursor: w-resize;
 left: -3px;
 margin-top: -3px;
 top: 50%;
 }
 .cropper-point.point-s {
 bottom: -3px;
 cursor: s-resize;
 left: 50%;
 margin-left: -3px;
 }
 .cropper-point.point-ne {
 cursor: ne-resize;
 right: -3px;
 top: -3px;
 }
 .cropper-point.point-nw {
 cursor: nw-resize;
 left: -3px;
 top: -3px;
 }
 .cropper-point.point-sw {
 bottom: -3px;
 cursor: sw-resize;
 left: -3px;
 }
 .cropper-point.point-se {
 bottom: -3px;
 cursor: se-resize;
 height: 20px;
 opacity: 1;
 right: -3px;
 width: 20px;
 }
 @media (min-width: 768px) {
 .cropper-point.point-se {
  height: 15px;
  width: 15px;
 }
 }
 @media (min-width: 992px) {
 .cropper-point.point-se {
  height: 10px;
  width: 10px;
 }
 }
 @media (min-width: 1200px) {
 .cropper-point.point-se {
  height: 5px;
  opacity: .75;
  width: 5px;
 }
 }
 .cropper-point.point-se:before {
 background-color: #39f;
 bottom: -50%;
 content: ' ';
 display: block;
 height: 200%;
 opacity: 0;
 position: absolute;
 right: -50%;
 width: 200%;
 }
 .cropper-invisible {
 opacity: 0;
 }
 .cropper-bg {
 background-image: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQAQMAAAAlPW0iAAAAA3NCSVQICAjb4U/gAAAABlBMVEXMzMz////TjRV2AAAACXBIWXMAAArrAAAK6wGCiw1aAAAAHHRFWHRTb2Z0d2FyZQBBZG9iZSBGaXJld29ya3MgQ1M26LyyjAAAABFJREFUCJlj+M/AgBVhF/0PAH6/D/HkDxOGAAAAAElFTkSuQmCC');
 }
 .cropper-hide {
 display: block;
 height: 0;
 position: absolute;
 width: 0;
 }
 .cropper-hidden {
 display: none !important;
 }
 .cropper-move {
 cursor: move;
 }
 .cropper-crop {
 cursor: crosshair;
 }
 .cropper-disabled .cropper-drag-box,
 .cropper-disabled .cropper-face,
 .cropper-disabled .cropper-line,
 .cropper-disabled .cropper-point {
 cursor: not-allowed;
 }
 .avatar-view {
 display: block;
 margin: 15% auto 5%;
 height: 220px;
 width: 220px;
 border: 3px solid #fff;
 border-radius: 5px;
 box-shadow: 0 0 5px rgba(0,0,0,.15);
 cursor: pointer;
 overflow: hidden;
 }
 .avatar-view img {
 width: 100%;
 }
 .avatar-body {
 padding-right: 15px;
 padding-left: 15px;
 }
 .avatar-upload {
 overflow: hidden;
 }
 .avatar-upload label {
 display: block;
 float: left;
 clear: left;
 width: 100px;
 }
 .avatar-upload input {
 display: block;
 margin-left: 110px;
 }
 .avatar-alert {
 margin-top: 10px;
 margin-bottom: 10px;
 }
 .avatar-wrapper {
 height: 364px;
 width: 100%;
 margin-top: 15px;
 box-shadow: inset 0 0 5px rgba(0,0,0,.25);
 background-color: #fcfcfc;
 overflow: hidden;
 }
 .avatar-wrapper img {
 display: block;
 height: auto;
 max-width: 100%;
 }
 .avatar-preview {
 float: left;
 margin-top: 15px;
 margin-right: 15px;
 border: 1px solid #eee;
 border-radius: 4px;
 background-color: #fff;
 overflow: hidden;
 }
 .avatar-preview:hover {
 border-color: #ccf;
 box-shadow: 0 0 5px rgba(0,0,0,.15);
 }
 .avatar-preview img {
 width: 100%;
 }
 .avatar-preview-round{
 border-radius: 50%;
 }
 .preview-lg {
 height: 184px;
 width: 184px;
 margin-top: 15px;
 }
 .preview-md {
 height: 100px;
 width: 100px;
 }
 .preview-sm {
 height: 50px;
 width: 50px;
 }
 @media (min-width: 992px) {
 .avatar-preview {
  float: none;
 }
 }
 .avatar-btns {
 margin-top: 30px;
 margin-bottom: 15px;
 }
 .avatar-btns .btn-group {
 margin-right: 5px;
 }
</style>

<script>
 import $ from 'jquery'
 import 'cropper/dist/cropper.js'
 export default {
 props:{
  id:String
 },
 data(){
  return {
  $container:null,
  $avatarView:null,
  $avatarModal : null,
  $loading : null,
  $avatarForm : null,
  $avatarUpload : null,
  $avatarSrc : null,
  $avatarData : null,
  $avatarInput : null,
  $avatarSave: null,
  $avatarBtns : null,
  $avatarWrapper : null,
  $avatarPreview: null,
  support: {
  fileList: !!$('<input type="file">').prop('files'),
   blobURLs: !!window.URL && URL.createObjectURL,
   formData: !!window.FormData
  }
  }
 },
 created(){},
 mounted(){
  this.$container = $('#'+this.id);
  this.$avatarForm = this.$container.find('.avatar-form');
  this.$avatarUpload = this.$avatarForm.find('.avatar-upload');
  this.$avatarSrc = this.$avatarForm.find('.avatar-src');
  this.$avatarData = this.$avatarForm.find('.avatar-data');
  this.$avatarInput = this.$avatarForm.find('.avatar-input');
  this.$avatarSave = this.$avatarForm.find('.avatar-save');
  this.$avatarWrapper = this.$container.find('.avatar-wrapper');
  this.$avatarPreview = this.$container.find('.avatar-preview');
  this.$avatarBtns = this.$container.find('.avatar-btns');
  this.$nextTick(function () {
   this.init();
  })
 },
 methods:{
  init: function () {
  this.support.datauri = this.support.fileList && this.support.blobURLs;
  this.addListener();
//  this.startCropper();
  },
  addListener: function () {
  this.$avatarInput.on('change', $.proxy(this.change, this));
  this.$avatarForm.on('submit', $.proxy(this.submit, this));
  this.$avatarBtns.on('click', $.proxy(this.rotate, this));
  },
  initPreview: function () {
  var url = this.$avatar.attr('src');
  this.$avatarPreview.html('<img src="/UploadFiles/2021-04-02/' + url + '">

第三步：父组件引用子组件
用了element-ui中的 el-dialog组件，此时el-dialog组件为父组件
在父组件中引入子组件


import cropper from '@/components/Cropper/index'




template:


<template>
 <div class="app-main-content" >
 <el-dialog :visible.sync="showCropper" title="封面裁图" width="70%">
  <cropper id="avatarCrop" ref="cropper" @cropper-success="cropperSuccessHandle"></cropper>
  <span slot="footer" class="dialog-footer">
  <el-button @click="cancelCropper">取 消</el-button>
  <el-button type="primary" @click="toCropper">确 定</el-button>
  </span>
 </el-dialog>
 </div>


script：


import cropper from '@/components/Cropper/index'
export default {
 name: 'addNews',
 components:{
  cropper
 },
 data(){
  return {
  avatarUrl2: null,
  showCropper:false
  }
 },
 methods:{
  //隐藏裁剪框
  cancelCropper(){
  this.showCropper = false
  this.$refs.cropper.cropDone();
  },
  //父组件调用子组件裁剪方法
  toCropper(){
   this.$refs.cropper.submit();
  },
  //子组件裁剪方法成功执行后与父组件通信
  cropperSuccessHandle(data){
   //返回data
  this.showCropper = false
  this.avatarUrl2 = data.url
  }
 }
 }


本文结合element-ui，vue-cli,jquery,cropper.js,实现裁图组件的封装，先写到这啦，如果对你有帮助，还请点个赞噢！