我有2个reactjs文件:
用户首先转到 Reports.js 生成的报告页面,然后调用后端服务器,该服务器立即返回,但显示加载旋转器。报告完成后,会将数据发送到 AuthContext.js。但是,我在 AuthContext.js 中遇到问题,无法在 Reports.js 中请求调用 setReportLoading() 来停止加载微调器。你能告诉我如何解决这个问题吗?
我尝试了setReportLoading()下面的方法,但出现了这个错误:
setReportLoading.js:115 Uncaught TypeError: setReportLoading is not a function
这是我的代码片段
In file AuthContext.js
import { setReportLoading } from 'Reports';
export const AuthProvider = ({ children }) => {
socket.on('processmessage', (msg) => {
if (msg.type == 'checking'){
setReportLoading(2);
}
});
}
In file Reports.js
const Reports = () => {
const [loading, setLoading] = useState(1)
const setReportLoading = (isLoading) => {
setLoading(isLoading);
};
const renderContent = () => {
if (loading === 1) return (
<div className="d-flex justify-content-center align-items-center" style={{ minHeight: '200px' }}>
<div className="spinner-border text-primary" role="status">
<span className="visually-hidden">{t('loc_react_loading')}</span>
</div>
</div>
)
if (loading === 2) return (
<div className="mb-4 card border-0 shadow-sm" style={{'min-width': '900px'}}>
{renderReportSelection()}
{showReport && renderReport()}
</div>
)
}
return (
<DashboardLayout>
</DashboardLayout>
)
}
export default Reports;
in AuthContext.js
import { atom, useAtom } from 'jotai';
export const reportloadingAtom = atom(1);
export const AuthProvider = ({ children }) => {
const [reportloading, setReportloading] = useAtom(reportloadingAtom);
socket.on('processmessage', (msg) => {
if (msg.type == 'checking') {
setReportloading(2);
}
});
// ...
};
in Reports.js
import { useAtom } from 'jotai';
import { reportloadingAtom } from 'AuthContext'
const Reports = () => {
const [reportloading, setReportloading] = useAtom(reportloadingAtom);
const [loading, setLoading] = useState(1);
useEffect(() => {
// This function will run every time the value of reportloadingAtom changes
function handleReportloadingChange() {
console.log("handleReportloadingChange")
setLoading(reportloading);
}
}, [reportloading]);
// ...
};
我认为如果没有第三方库,您就无法导出或导入在 React 组件内声明的函数。您可以做的是将其作为道具传递给子组件。
鉴于您共享的代码,我建议您将 AuthProvider 重构为常规函数,而不是 React 组件。我建议这样做是因为我没有将您的 AuthProvider 视为报告组件的子组件。然后,您可以在报告组件中调用此函数并让它返回一些值,然后更改加载的值。