我正在尝试更新我的状态变量，它是一个包含布尔变量的对象。一旦数据可用（通过按钮点击调用的API调用响应），我就在useEffect内部更新我的状态。然后使用这些数据调用另一个组件，即一个模态框，如果没有数据可用，我将显示另一个模态框。当我关闭弹出窗口时，应该更新状态变量。
const [modalState, setModalState] = useState<IModalState>({
showNoUsersModal: false,
showModal: false,
});
useEffect(() => {
if (data && data.length > 0) {
setModalState({
...modalState,
showModal: true,
showNoUsersModal: false,
});
} else if (data && data.length === 0) {
setModalState({
...modalState,
showModal: false,
showNoUsersModal: true,
});
}
});
const onApplicationSuccess = () => {
setModalState({
...modalState,
showModal: false,
showNoUsersModal: false,
});
}
const onClose = () => {
setModalState({
...modalState,
showModal: false,
showNoUsersModal: false,
});
}
return (
<div>
{modalState.showNoUsersModal && (
<NoUsersFoundModal
onCancel={() =>
setModalState({
...modalState,
showModal: false,
showNoUsersModal: false,
})
}
/>
)}
{modalState.showModal && (
<SomeOtherModal
onCancel={() =>
setModalState({
...modalState,
showModal: false,
showNoUsersModal: false,
})
}
/>
)}
</div>
) 
this issue was because you didn't pass any dependency array to useEffect so when ever state was changing useEffect was calling again. here is the solution .
useEffect(() => { if (data && data.length > 0 ) { setModalState({ ...modalState, showModal: true, showNoUsersModal: false, }); } else if (data && data.length == 0) { setModalState({ ...modalState, showModal: false, showNoUsersModal: true, }); } },[]);这个问题是因为你没有传递任何依赖数组给 useEffect，所以每当状态改变时 useEffect 就会再次调用。这里是解决方案。
useEffect(() => { if (data && data.length > 0 ) { setModalState({ ...modalState, showModal: true, showNoUsersModal: false, }); } else if (data && data.length == 0) { setModalState({ ...modalState, showModal: false, showNoUsersModal: true, }); } },[]);