安装

npm install vue-image-crop-upload

组件代码：

<template>
  <div id="app">
    <a class="btn" @click="toggleShow">设置头像</a>
    <my-upload field="img" @crop-success="cropSuccess" v-model="show" :width="200" :height="200" img-format="png" :size="size"></my-upload>
    <img :src="avatar">
  </div>
</template>

<script>
  import 'babel-polyfill'; // es6 shim
  import myUpload from 'vue-image-crop-upload';
  export default {
    data() {
      return {
        avatar: "",
        show: false,
        size:2.1
      }
    },
    components: {
      "my-upload": myUpload
    },
    methods: {
      toggleShow() {
        this.show = !this.show;
      },
      cropSuccess(imgDataUrl) {
        //  imgDataUrl其实就是经过base64转码过的图片
        this.avatar = imgDataUrl;
        console.log(imgDataUrl)//这里打印出来的是base64格式的资源，太长了
        //base64转blob格式
        let arr = imgDataUrl.split(','), mime = arr[0].match(/:(.*?);/)[1],
          bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);
        while (n--) {
          u8arr[n] = bstr.charCodeAt(n);
        }
        let bdata = new Blob([u8arr], { type: mime })
        // console.log(new Blob([u8arr], { type: mime })) ;//这里打印base64转成blob的资源，根据自己的项目需求去转吧
      }
    }

  }
</script>

<style>


</style>