fix:修复

src/modules/course-manage/offline-course/modal/QRCodeModal.jsx

@@ -100,8 +100,8 @@ export default class QRCodeModal extends React.Component {
     const { courseName, whetherSetSignIn, whetherSetSignOut } = data;
     const date = moment(selectedDate).format('YYYY-MM-DD');
     const unit = (data.signInTimeUnit || '').toLocaleLowerCase() + 's';
-    const time = moment(`${date} ${moment(data.signInType == 'START_AGO' ? data.startTime : data.endTime).format('HH:mm')}`).subtract(data.signInTimeNum, unit);
-    const signInTime = `${moment(time).format('YYYY-MM-DD HH:mm')} ~ ${moment(data.signInType == 'START_AGO' ? data.startTime : data.endTime).format('YYYY-MM-DD HH:mm')}`;
+    const time = moment(`${date} ${moment(data.signInType == 'START_AGO' ? data.startTime : data.endTime).format('HH:mm')}`);
+    const signInTime = `${moment(time).subtract(data.signInTimeNum, unit).format('YYYY-MM-DD HH:mm')} ~ ${moment(time).format('YYYY-MM-DD HH:mm')}`;
     const endUnit = (data.signOutEndTimeUnit || '').toLocaleLowerCase() + 's';
     const end = moment(`${date} ${moment(data.endTime).format('HH:mm')}`).add(data.signOutEndTimeNum, endUnit);
     let startUnit = '';