• 获取当前时间:
    1. QDateTime curDateTime = QDateTime::currentDateTime();
    • 时间 -> 字符串:
    1. curDateTime.toString("hh:mm:ss"); // 09:22:23
    2. curDateTime.toString("yyyy-MM-dd"); // 2021-09-23
    3. curDateTime.toString("yyyy-MM-dd hh:mm:ss"); // 2021-09-23 09:22:23
    • 字符串 -> 时间:
    1. QString timeStr = "09:22:23";
    2. QTime time = QTime::fromString(timeStr, "hh:mm:ss");
    4. QString dateStr = "2021-09-23";
    5. QDate date = QDate::fromString(dateStr, "yyyy-MM-dd");
    7. QString dateTimeStr = "2021-09-23 09:22:23"
    8. QDateTime dt = QDateTime::fromString(dateTimeStr, "yyyy-MM-dd hh:mm:ss");