嵌套调用接口函数来获取并更改信息，但是第二个接口函数取不到循环的i值，尝试传参，但是then方法又不太了解
fetchUserList(this.listQuery).then(response => {

    this.list = response.data.list
    for(var i=0;i < this.list.length;i++){
      this.list[i] = Object.assign({},this.list[i],this.list[i].sysUser)
      // this.list[i].office = getOfficeInfoById(this.list[i].officeId)
      getOfficeInfoById(this.list[i].officeId).then(response =>{
        this.office = response.data.data.name
        console.log(i)
      })
    }
    console.log(this.list)
    this.total = response.data.total 
    this.listLoading = false
  })