使用 qt.conf

可以使用 qt.conf 文件以覆蓋路徑或指定要傳遞給平颱插件的自變量。

格式和定位

The qt.conf 文件是 INI 文本文件，作為描述在 QSettings 文檔編製。

QLibraryInfo 將加載 qt.conf 從以下位置之一：

:/qt/etc/qt.conf 使用資源係統
on macOS, in the Resource directory inside the application bundle, for example assistant.app/Contents/Resources/qt.conf
in the directory containing the application executable, i.e. QCoreApplication::applicationDirPath () + QDir::separator () + "qt.conf"

覆寫路徑

The qt.conf file can be used to override the hard-coded paths that are compiled into the Qt library. These paths are accessible using the QLibraryInfo class. Without qt.conf , the functions in QLibraryInfo return these hard-coded paths; otherwise they return the paths as specified in qt.conf .

Without qt.conf , the Qt libraries will use the hard-coded paths to look for plugins, translations, and so on. These paths may not exist on the target system, or they may not be accessible. Because of this, you may need qt.conf to make the Qt libraries look elsewhere.

The file should have a Paths group which contains the entries that correspond to each value of the QLibraryInfo::LibraryLocation enum. See the QLibraryInfo documentation for details on the meaning of the various locations.

Entry	默認值
前綴	QCoreApplication::applicationDirPath ()
文檔編製	`doc`
頭	`包括`
庫	`lib`
LibraryExecutables	`libexec`
Binaries	`bin`
插件	`plugins`
Imports	`imports`
Qml2Imports	`qml`
ArchData	`.`
數據	`.`
翻譯	`translations`
範例	`examples`
測試	`tests`
設置	`.`

Absolute paths are used as specified in the qt.conf file. All paths are relative to the 前綴 . On Windows and X11, the 前綴 is relative to the directory containing the application executable ( QCoreApplication::applicationDirPath ()). On macOS, the 前綴 is relative to the 內容 in the application bundle. For example, application.app/Contents/plugins/ is the default location for loading Qt plugins. Note that the plugins need to be placed in specific sub-directories under the plugins directory (see 如何創建 Qt 插件瞭解細節)。

For example, a qt.conf file could contain the following:

[Paths]
Prefix = /some/path
Translations = i18n

注意： The backslash character is treated as a special character in INI files (see QSettings ). It is therefore recommended to use forward slashes for paths on Windows as well. Otherwise, an escape character is required:

Prefix = c:\\SomePath

配置平颱插件自變量

The qt.conf 可能包含 平颱 group, whose keys are comma-delimited lists of arguments to be passed to the platform plugin. The key name is the name of the platform plugin with the first letter upper-cased followed by 自變量 .

例如：

[Platforms]
WindowsArguments = fontengine=freetype

would cause the Windows platform plugin to use the FreeType 字體引擎。