Cropper.js に基づいて vue をカプセル化し、オンライン画像トリミング コンポーネントの機能を実装します。

npm install cropper
# or
bower install cropper

<script src="/path/to/jquery.js"></script><!-- jQuery is required -->
<link href="/path/to/cropper.css" rel="external nofollow" rel="stylesheet">
<script src="/path/to/cropper.js"></script>

<!-- Wrap the image or canvas element with a block element (container) -->
<p>
 ![](picture.jpg)
</p>

/* Limit image width to avoid overflow the container */
img {
 max-width: 100%; /* This rule is very important, please do not ignore this! */
}

$('#image').cropper({
 aspectRatio: 16 / 9,
 crop: function(e) {
 // Output the result data for cropping image.
 console.log(e.x);
 console.log(e.y);
 console.log(e.width);
 console.log(e.height);
 console.log(e.rotate);
 console.log(e.scaleX);
 console.log(e.scaleY);
 }
});

<!-- input框 -->
<input id="myCropper-input" type="file" :accept="imgCropperData.accept" ref="inputer" @change="handleFile">
//模拟点击
document.getElementById(&#39;myCropper-input&#39;).click();

// imgCropperData: {
// accept: 'image/gif, image/jpeg, image/png, image/bmp',
// }
handleFile (e) {
 let _this = this;
 let inputDOM = this.$refs.inputer;
 // 通过DOM取文件数据
 _this.file = inputDOM.files[0];
 // 判断文件格式
 if (_this.imgCropperData.accept.indexOf(_this.file.type) == -1) {
 _this.$Modal.error({
  title: '格式错误',
  content: '您选择的图片格式不正确！'
 });
 return;
 }
 // 判断文件大小限制
 if (_this.file.size > 5242880) {
 _this.$Modal.error({
  title: '超出限制',
  content: '您选择的图片过大，请选择5MB以内的图片！'
 });
 return;
 }
 var reader = new FileReader();
 // 将图片将转成 base64 格式
 reader.readAsDataURL(_this.file);
 reader.onload = function () {
 _this.imgCropperData.imgSrc = this.result;
 _this.initCropper();
 }
}

// 初始化剪切
 initCropper () {
 let _this = this;
 // 初始化裁剪区域
 _this.imgObj = $('![](' + _this.imgCropperData.imgSrc + ')');
 let $avatarPreview = $('.avatar-preview');
 $('#myCropper-workspace').empty().html(_this.imgObj);
 _this.imgObj.cropper({
  aspectRatio: _this.proportionX / _this.proportionY,
  preview: $avatarPreview,
  crop: function(e) {

  }
 });
 }

let $imgData = _this.imgObj.cropper('getCroppedCanvas')
imgBase64Data = $imgData.toDataURL('image/png');

// 构造上传图片的数据
let formData = new FormData();
// 截取字符串
let photoType = imgBase64Data.substring(imgBase64Data.indexOf(",") + 1);
//进制转换
const b64toBlob = (b64Data, contentType = '', sliceSize = 512) => {
 const byteCharacters = atob(b64Data);
 const byteArrays = [];
 for(let offset = 0; offset < byteCharacters.length; offset += sliceSize) {
 const slice = byteCharacters.slice(offset, offset + sliceSize);
 const byteNumbers = new Array(slice.length);
 for(let i = 0; i < slice.length; i++) {
  byteNumbers[i] = slice.charCodeAt(i);
 }
 const byteArray = new Uint8Array(byteNumbers);
 byteArrays.push(byteArray);
 }
 const blob = new Blob(byteArrays, {
 type: contentType
 });
 return blob;
}
const contentType = &#39;image/jepg&#39;;
const b64Data2 = photoType;
const blob = b64toBlob(b64Data2, contentType);
formData.append("file", blob, "client-camera-photo.png")
formData.append("type", _this.imgType)

//bus.js
import Vue from 'vue'; 
export default new Vue();

// A.vue
import Bus from '../../components/bus/bus.js'
export default {
 components: { Bus },
 data () {},
 created: function () {
 Bus.$on('getTarget', imgToken => { 
  var _this = this;
  console.log(imgToken);
  ... 
 }); 
 }
}

// B.vue
// 传参
Bus.$emit('getTarget', imgToken);