qt中关于QDateTime的使用

声明没有定义，一般为头文件没有添加，查看发现你已经添加，但又发现#include <QDateTime>头文件上一行最后有个 “\” ，便变成了跟在上一行之后，出现错误，去掉 “\” 应该就没问题了

第一步，创建一个dateTimeEdit，第二步，将其connect到一个函数上，第三部，提取它的QDateTime,然后利用下面的函数就可以了，它是基于shell命令的：

void moreidDialog::slot_save_time_key()

{

QDateTime time

QString str = txt_time->text()

//判断格式是否正确

if (str.count(".") != 4)

{

txt_time->setText(tr("ge shi cuo wu"))

return

}

int i = 0,j = 0

i = str.indexOf(".")

QString year = str.mid(0,i)

j = str.indexOf(".",i + 1)

QString month = str.mid(i + 1,j - i - 1)

i = j

j = str.indexOf(".",i + 1)

QString day = str.mid(i + 1,j - i - 1)

i = j

j = str.indexOf(".",i + 1)

QString hour = str.mid(i + 1,j - i - 1)

i = j

j = str.indexOf(".",i + 1)

QString min = str.mid(i + 1,j - i - 1)

bool ok = false

year.toInt(&ok)

if (ok == false)

{

txt_time->setText(tr("ge shi cuo wu"))

return

}

month.toInt(&ok)

if (ok == false)

{

txt_time->setText(tr("ge shi cuo wu"))

return

}

day.toInt(&ok)

if (ok == false)

{

txt_time->setText(tr("ge shi cuo wu"))

return

}

hour.toInt(&ok)

if (ok == false)

{

txt_time->setText(tr("ge shi cuo wu"))

return

}

min.toInt(&ok)

if (ok == false)

{

txt_time->setText(tr("ge shi cuo wu"))

return

}

str = "date -s " + month + "/" + day + "/" + year

system(str.toLatin1().data())

str = "date -s " + hour + ":" + min + ":" + "00"

system(str.toLatin1().data())

//强制写入到CMOS

system("clock -w")

}

这个比较简单的哦，我给你讲步骤吧，

第一步，创建一个dateTimeEdit，第二步，将其connect到一个函数上，第三部，提取它的QDateTime,然后利用下面的函数就可以了，它是基于shell命令的：

void moreidDialog::slot_save_time_key()

{

QDateTime time

QString str = txt_time->text()

//判断格式是否正确

if (str.count(".") != 4)

{

txt_time->setText(tr("ge shi cuo wu"))

return

}

int i = 0,j = 0

i = str.indexOf(".")

QString year = str.mid(0,i)

j = str.indexOf(".",i + 1)

QString month = str.mid(i + 1,j - i - 1)

i = j

j = str.indexOf(".",i + 1)

QString day = str.mid(i + 1,j - i - 1)

i = j

j = str.indexOf(".",i + 1)

QString hour = str.mid(i + 1,j - i - 1)

i = j

j = str.indexOf(".",i + 1)

QString min = str.mid(i + 1,j - i - 1)

bool ok = false

year.toInt(&ok)

if (ok == false)

{

txt_time->setText(tr("ge shi cuo wu"))

return

}

month.toInt(&ok)

if (ok == false)

{

txt_time->setText(tr("ge shi cuo wu"))

return

}

day.toInt(&ok)

if (ok == false)

{

txt_time->setText(tr("ge shi cuo wu"))

return

}

hour.toInt(&ok)

if (ok == false)

{

txt_time->setText(tr("ge shi cuo wu"))

return

}

min.toInt(&ok)

if (ok == false)

{

txt_time->setText(tr("ge shi cuo wu"))

return

}

str = "date -s " + month + "/" + day + "/" + year

system(str.toLatin1().data())

str = "date -s " + hour + ":" + min + ":" + "00"

system(str.toLatin1().data())

//强制写入到CMOS

system("clock -w")

}

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