时间函数

时间,不外乎就是获取时间,必要时转化一下时间显示格式.直接看例子吧

QDateEdit 和 QTimeEdit

QDateEdit

date：保存了部件的显示日期。minimumDate：定义了用户可以设置的最小日期。maximumDate：定义了用户可以设置的最大日期。displayFormat：包含了一个字符串用于格式化日期。

QTimeEdit

time：保存了部件的显示时间。minimumTime：定义了用户可以设- 置的最小时间。maximumTime：定义了用户可以设置的最大时间。displayFormat：包含了一个字符串用于格式化时间。

QDateTime

时间调整和范围设置

函数描述QDateTime addDays(qint64 ndays) constQDateTime addMSecs(qint64 msecs) constQDateTime addMonths(int nmonths) constQDateTime addSecs(qint64 s) constQDateTime addYears(int nyears) constvoid setDate(const QDate &date)void setTime(const QTime &time)void setTimeSpec(Qt::TimeSpec spec)区域时间void setTimeZone(const QTimeZone &toZone)时区

判断

函数描述bool isDaylightTime() constbool isNull() constbool isValid() const

格式转化

函数描述CFDateRef toCFDate() constQDateTime toLocalTime() constqint64 toMSecsSinceEpoch() constNSDate * toNSDate() constQDateTime toOffsetFromUtc(int offsetSeconds) constqint64 toSecsSinceEpoch() constQString toString(const QString &format) constQString toString(Qt::DateFormat format = Qt::TextDate) constQString toString(QStringView format) constQDateTime toTimeSpec(Qt::TimeSpec spec) constQDateTime toTimeZone(const QTimeZone &timeZone) constQDateTime toUTC() const

格式控制

字符表示hthe hour without a leading zero (0 to 23 or 1 to 12 if AM/PM display)hhthe hour with a leading zero (00 to 23 or 01 to 12 if AM/PM display)Hthe hour without a leading zero (0 to 23, even with AM/PM display)HHthe hour with a leading zero (00 to 23, even with AM/PM display)mthe minute without a leading zero (0 to 59)mmthe minute with a leading zero (00 to 59)sthe whole second without a leading zero (0 to 59)ssthe whole second with a leading zero where applicable (00 to 59)zthe fractional part of the second, to go after a decimal point, without trailing zeroes (0 to 999). Thus “s.z” reports the seconds to fullzzzthe fractional part of the second, to millisecond precision, including trailing zeroes where applicable (000 to 999).AP or Ause AM/PM display. A/AP will be replaced by either “AM” or “PM”.ap or ause am/pm display. a/ap will be replaced by either “am” or “pm”.tthe timezone (for example “CEST”)

QDateTimeEdit

时间日期函数,可以设置显示格式,时间范围,调用日历

set

函数描述oid setCalendarPopup(bool enable)弹出日历选择void setCalendarWidget(QCalendarWidget *calendarWidget)弹出的日历窗体void setCurrentSection(QDateTimeEdit::Section section)设置现在的sessionvoid setCurrentSectionIndex(int index)void setDateRange(const QDate &min, const QDate &max)data 范围void setDateTimeRange(const QDateTime &min, const QDateTime &max)datetime 范围void setDisplayFormat(const QString &format)显示格式void setMaximumDate(const QDate &max)void setMaximumDateTime(const QDateTime &dt)void setMaximumTime(const QTime &max)void setMinimumDate(const QDate &min)void setMinimumDateTime(const QDateTime &dt)void setMinimumTime(const QTime &min)void setSelectedSection(QDateTimeEdit::Section section)设置当前的seeionvoid setTimeRange(const QTime &min, const QTime &max)void setTimeSpec(Qt::TimeSpec spec)区域

slots

void setDate(const QDate &date) void setDateTime(const QDateTime &dateTime) void setTime(const QTime &time)

signal

void dateChanged(const QDate &date) void dateTimeChanged(const QDateTime &datetime) void timeChanged(const QTime &time) /* * 时间日期函数 * 时间的获取,输出的格式,转化类型给QString,日历的调用 */ mywidget::mywidget() { setWindowTitle("my widget test"); QVBoxLayout *layout=new QVBoxLayout(this); QDateTimeEdit *pdate_time_edit=new QDateTimeEdit(QDateTime::currentDateTime(),this); pdate_time_edit->setDateRange(QDate::currentDate().addDays(-365),QDate::currentDate().addDays(365));//设置范围 pdate_time_edit->setTimeRange(QTime::currentTime().addMSecs(-10),QTime::currentTime().addMSecs(10)); pdate_time_edit->setDisplayFormat("yyyy-MM-dd HH:mm:ss"); pdate_time_edit->setCalendarPopup(true); //允许弹出日历 layout->addWidget(pdate_time_edit); qDebug()<<"Date:"<<pdate_time_edit->date(); qDebug()<<"date_time:"<<pdate_time_edit->dateTime(); //signal connect(pdate_time_edit,QOverload<const QDate&>::of(&QDateTimeEdit::dateChanged),[&pdate_time_edit](QDate date){ qDebug()<<"Date have change,now date is "<<date; }); // 各部分对应的值 QString strYear = pdate_time_edit->sectionText(QDateTimeEdit::YearSection); QString strMonth = pdate_time_edit->sectionText(QDateTimeEdit::MonthSection); QString strDay = pdate_time_edit->sectionText(QDateTimeEdit::DaySection); QString strHour = pdate_time_edit->sectionText(QDateTimeEdit::HourSection); QString strMinute = pdate_time_edit->sectionText(QDateTimeEdit::MinuteSection); QString strSecond = pdate_time_edit->sectionText(QDateTimeEdit::SecondSection); qDebug()<<strYear<<"年"<<strMonth<<"月"<<strDay<<"日\n"<<strHour<<":"<<strMinute<<":"<<strSecond; this->show(); }