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in Technique[技术] by (71.8m points)

react hooks 使用userState获取不到最新值?

functiong mov(){
const [source, setSource] = useState([]);
}
useEffect(() => {

const hide = message.loading('正在加载');
try {
  if (id !== '') {
    fetchData().then(r => hide());
  }
} catch (e) {
  hide();
}

}, []);
//读取数据,并且放入一个数组中
function fetchData() {

setSource(async ()=>{
  const res = await queryBilling(id);
  return res;//这里可以获取值
})
   console.log(source,'data') ----这里获取不到source的值?????
//查询接口

}


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1 Reply

0 votes
by (71.8m points)

建议你这样写

const func = async () => {
  const res = await queryBilling(id);
  if (res) {
    setSource(res);
  }

}

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
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