Product Versions

Use the following macros to display version and status information about a topic:

Macro	Expands To
\QtMajorVersion	The major version number based on the $QT_VER environment variable
\QtMinorVersion	The minor version number based on the $QT_VER environment variable
\QtVersion	The value of the $ QT_VERSION 环境变量
\QtVer	The value of the $QT_VER environment variable
\techpreview	The statement that a module or class is preliminary and might change

\techpreview

Appends the tech preview link to the brief sentence and adds the topic to the tech_preview group.

Must be placed directly under a

另请参阅 macro and 宏 .