update(e){
     let file = e.target.files[0];      
     let param = new FormData(); //创建form对象
     param.append('file',file,file.name);//通过append向form对象添加数据
     param.append('chunk','0');//添加form表单中其他数据
     console.log(param.get('file')); //FormData私有类对象，访问不到，可以通过get判断值是否传进去
     let config = {
      headers:{'Content-Type':'multipart/form-data'}
     }; //添加请求头
     this.axios.post('http://upload.qiniu.com/',param,config)
     .then(response=>{
      console.log(response.data);
     })    
}

 update(e){
     let file = e.target.files[0];
     let d = new Date();
     let type = file.name.split('.');
     let tokenParem = {
       'putPolicy':'{\"name\":\"$(fname)\",\"size\":\"$(fsize)\",\"w\":\"$(imageInfo.width)\",\"h\":\"$(imageInfo.height)\",\"hash\":\"$(etag)\"}',
       'key':'orderReview/'+d.getFullYear()+'/'+(d.getMonth()+1)+'/'+d.getDate()+'/'+d.valueOf()+'.'+type[type.length-1],
       'bucket':this.domain,//七牛的地址，这个是你自己配置的（变量）
     };
     let param = new FormData(); //创建form对象
     param.append('chunk','0');//断点传输
     param.append('chunks','1');
     param.append('file',file,file.name)
     console.log(param.get('file')); //FormData私有类对象，访问不到，可以通过get判断值是否传进去
     let config = {
      headers:{'Content-Type':'multipart/form-data'}
     };
    //先从自己的服务端拿到token
     this.axios.post(api.uploadToken,qs.stringify(tokenParem))
      .then(response=>{
        this.token = response.data.uploadToken;
        param.append('token',this.token);
        if(this.images.length>8){
          alert('不能超过9张');
          return;
        }
        this.uploading(param,config,file.name);//然后将参数上传七牛
        return;
      })
   },
   uploading(param,config,pathName){
    this.axios.post('http://upload.qiniu.com/',param,config)
     .then(response=>{
      console.log(response.data);
      let localArr = this.images.map((val,index,arr)=>{
       return arr[index].localSrc;
      })
      if(!~localArr.indexOf(pathName)){
       this.images.push({'src':this.showUrl+response.data.key,'localSrc':pathName});
      }else{
        alert('已上传该图片');
      }
     })
   },