Recently wrote the first coding problem of QT4: the system time interface and the implementation of the modification of the system time.I summed up the resources on the Internet and made a summary here.
First of all, Qt itself does not provide a time setting function
Qt itself does not provide a time setting function, the implementation of the system to modify the time using the Windows native API function SetSystemTime Therefore, the header file needs to be added # include <windows.h>
Code section
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//The following is part of the code of my program Void MainWindow::on_pushButton_3_clicked() { SYSTEMTIME st; GetLocalTime(&st); st.wHour=ui->spinBox->value(); st.wMinute=ui->spinBox_2->value(); st.wSecond=ui->spinBox_3->value(); SetLocalTime(&st); } |
common problem:
- Someone may find the following code online:
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/ / Time zone issue with the following code Bool Dialog::timeedit() { SYSTEMTIME st; GetSystemTime(&st); st.wHour=ui->timeEdit->time().hour(); st.wMinute=ui->timeEdit->time().minute(); Return SetSystemTime(&st); } |
The result of running the above code shows that the time zone is incorrect: GetSystemTime() gets Greenwich time;
- No problem with the above, the program does not report an error, but the system time does not change
Please run QTcreator as administrator.
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Reprinted Note Source: Baiyuan's Blog>>https://wangbaiyuan.cn/en/qt-how-to-modify-system-time-and-time-zone-error-problem-2.html
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