Qt gets the current time and formats the output and converts the product seconds to time __QT

1 Format Output Current moment

Qdebug () << "currenttime--" <<qtime::currenttime (). toString (qt::isodate)
           <<qdatetime:: Currentdatetime (). ToString (qt::isodate)
          <<qdatetime::currentdatetime (). ToString ("Yyyy-mm-dd hh:mm:ss: Zzz ");

The output is:

currenttime--"16:03:27" "
 2016-02-24t16:03:27" "
 2016-02-24 16:03:27:607"

2 Get the number of seconds since 1970-01-01 and turn this description into a date

int I=qdatetime::currentdatetime (). totime_t ();
    Qdebug () << "i--" <<i;
    Qdebug () <<qdatetime::fromtime_t (i). toString ("Yyyy-mm-dd hh:mm:ss.zzz");

The output is:

i--1458134574
"2016-03-16 21:22:54.000"

3 Gets the current time into a string form and converts the string of this time to the date

QString s=qdatetime::currentdatetime (). toString ("Yyyy-mm-dd hh:mm:ss.zzz");
    Qdatetime datetime=qdatetime::fromstring (S, "Yyyy-mm-dd hh:mm:ss.zzz");
    Qdebug () << "time--" <<s;
    Qdebug () <<datetime.tostring ("Yyyy-mm-dd hh:mm:ss.zzz");

The output is:

time--"2016-03-16 21:26:00.635"
"2016-03-16 21:26:00.635"

3 Qdatetime plus a certain number of seconds

Qdatetime provides these functions to provide an operation to increase the number of minutes from the date to the data.

    Qdatetime datetime=qdatetime::currentdatetime ();
    Qdatetime datetime2=datetime.addsecs (7000000000);
    Qdebug () <<datetime.tostring (qt::isodate)
              <<datetime2.tostring (qt::isodate);

The output is:

Starting F:\exercise\build-untitled20-desktop4_8_5-Debug\debug\untitled20.exe ...