a date value.
The
date
type refers to a date value, including the time of the day.
要创建
date
value, specify it as a "YYYY-MM-DDThh:mm:ss.zzzZ" string. (The T is literal, YYYY is a full year number, MM and DD are month and day numbers, hh, mm and ss are hours, minutes and seconds, with .zzz as milliseconds and Z as time-zone offset. The T and following time are optional. If they are omitted, the date is handled as the start of UTC's day, which falls on other dates in some time-zones. When T is included, the :ss.zzz or just .zzz part can be omitted. With or without those, the zone offset can be omitted, in which case local time is used.) For example:
MyDatePicker { minDate: "2000-01-01 0:0"; maxDate: "2020-12-31 23:59" }
To read a date value returned from a C++ extension class, use Qt.formatDate() and Qt.formatDateTime() .
When integrating with C++, note that any
QDate
or
QDateTime
值
passed into QML from C++
is automatically converted into a
date
value, and vice-versa. Note, however, that converting a
QDate
will result in UTC's start of the day, which falls on a different date in some other time-zones. It is usually more robust to convert the
QDate
via a
QDateTime
explicitly, specifying local-time or a relevant time-zone and selecting a time of day (such as noon) that reliably exists (daylight-savings transitions skip an hour, near one end or the other of a day).
This basic type is provided by the QML language. It can be implicitly converted to a Date 对象。
另请参阅 QML Date object and QML 基本类型 .
