<input @change="toBase64($event)" type="file" accept="image/*" />

toBase64(e){
  let that = this;
  let files = e.target.files[0];
  let reader = new FileReader();
  reader.readAsDataURL(files);
  reader.onload = function(){
    let imgcode = this.result.replace(/^data:image\/(jpeg|png|gif|jpg|bmp);base64,/, ‘‘);
    //下面请求接口，返回图片路径，然后赋值显示
    _this.$axios.post(‘接口地址‘,{
      filename:files.name,
      file_base64:imgcode,
    }).then(res=>{
      //赋值。。。。。
    })

  }
}

e.target.value = ‘‘;