| QT_VERSION | |
| QT_VERSION_CHECK ( major , minor , patch ) |
This macro expands to a numeric value of the same form as
QT_VERSION_CHECK
() constructs, that specifies the version of Qt with which code using it is compiled. For example, if you compile your application with Qt 6.1.2, the QT_VERSION macro will expand to
0x060102
, the same as
QT_VERSION_CHECK(6, 1, 2)
. Note that this need not agree with the version the application will find itself using at
runtime
.
You can use QT_VERSION to select the latest Qt features where available while falling back to older implementations otherwise. Using QT_VERSION_CHECK () for the value to compare with is recommended.
范例：
#if QT_VERSION >= QT_VERSION_CHECK(4, 1, 0) QIcon icon = style()->standardIcon(QStyle::SP_TrashIcon); #else QPixmap pixmap = style()->standardPixmap(QStyle::SP_TrashIcon); QIcon icon(pixmap); #endif
另请参阅 QT_VERSION_STR , QT_VERSION_CHECK ()，和 qVersion ().
Turns the
major
,
minor
and
patch
numbers of a version into an integer that encodes all three. When expressed in hexadecimal, this integer is of form
0xMMNNPP
wherein
0xMM ==
major
,
0xNN ==
minor
，和
0xPP ==
patch
. This can be compared with another similarly processed version ID.
范例：
#include <QtGlobal> #if QT_VERSION >= QT_VERSION_CHECK(5, 0, 0) #include <QtWidgets> #else #include <QtGui> #endif
注意：
the parameters are read as integers in the normal way, so should normally be written in decimal (so a
0x
prefix must be used if writing them in hexadecimal). Thus
QT_VERSION_CHECK(5, 15, 0)
等于
0x050f00
, which could equally be written
QT_VERSION_CHECK(5, 0xf, 0)
.
另请参阅 QT_VERSION .
