怎样将fetch获取到的数据组成数组

Question

RequestData(){

    let urllist = ['5s0','5s1','5s2','5s3','5s4']
    for(let i = 0 ; i < urllist.length ; i++){
    let URL = theme.leancloud+'api/client/getAppPhoto?photoName='+urllist[i];
    let map={
        method:'GET'
    }
    let privateHeaders = {
        'Content-Type':"application/json;charset=utf-8"
        }
        map.headers=privateHeaders
    fetch(URL,map).then(
        (res) => {
            res.json().then(
                (result)=>{
               if(result.status=='success'){
                  this.setState({
                    photo:result.message
                  })
               }else{
                this.setState({
                    photo:result.message
                  })
               }
               }
               )
        }
    ).catch(
        (error) => {
            console.log(error)
        }
    )
    }
}