javascript - 为什么 React Hooks 不更新数据

Question

我尝试使用获取的数据更新 useState 中的值。当我控制台.log data.success时，它返回正确。然后我将其分配给成功值。但它返回false!为什么？为什么值(value)成功没有立即更新。最后我从服务器收到登录成功的消息。登录成功: false用户管理员已登录

const Signin = () => {
  const [values, setValues] = useState({
    success: false
  });

  const { success } = values;

  const clickSubmit = async event => {
    event.preventDefault();

    const signReact = catchAsync(async (email, password) => {
      const data = await signin(email, password) // fetch data from the server
      console.log(data.success); // -> true
      if (data) {
        setValues({
          ...values, success: data.success // -> assign to success
        });
        console.log("SIGN IN success: " + success); // -> false! why?!
      }
      return data;
    });

    signReact(email, password);
  };

Answer 1

使用useEffect 。尝试这样的事情:

useEffect(() => {
    console.log("SIGN IN success: " + values.success);
  }, [values]);

...
...
 const data = await signin(email, password);
 setValues(prevState =>{...prevState, success: data.success});