QT软件开发: 获取下载桌面临时文件....等系统默认目录
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QT版本： 5.12.6
头文件:
#include <QStandardPaths>示例代码:
qDebug()<<"系统字体目录路径:"<<QStandardPaths::standardLocations(QStandardPaths::FontsLocation);
qDebug()<<"系统桌面目录路径:"<<QStandardPaths::standardLocations(QStandardPaths::DesktopLocation);
qDebug()<<"用户文档目录路径:"<<QStandardPaths::standardLocations(QStandardPaths::DocumentsLocation);
qDebug()<<"用户音乐目录路径:"<<QStandardPaths::standardLocations(QStandardPaths::MusicLocation);
qDebug()<<"用户图片目录路径:"<<QStandardPaths::standardLocations(QStandardPaths::PicturesLocation);
qDebug()<<"系统临时文件目录路径:"<<QStandardPaths::standardLocations(QStandardPaths::TempLocation);
qDebug()<<"系统缓存目录路径:"<<QStandardPaths::standardLocations(QStandardPaths::CacheLocation);
qDebug()<<"系统下载目录路径:"<<QStandardPaths::standardLocations(QStandardPaths::DownloadLocation);
qDebug()<<"系统缓存目录路径:"<<QStandardPaths::standardLocations(QStandardPaths::CacheLocation);
MacOS与Windows系统的目录路径说明:
| Path type | Windows | |
| DesktopLocation | "~/Desktop" | "C:/Users/<USER>/Desktop" |
| DocumentsLocation | "~/Documents" | "C:/Users/<USER>/Documents" |
| FontsLocation | "/System/Library/Fonts" (not writable) | "C:/Windows/Fonts" (not writable) |
| ApplicationsLocation | "/Applications" (not writable) | "C:/Users/<USER>/AppData/Roaming/Microsoft/Windows/Start Menu/Programs" |
| MusicLocation | "~/Music" | "C:/Users/<USER>/Music" |
| MoviesLocation | "~/Movies" | "C:/Users/<USER>/Videos" |
| PicturesLocation | "~/Pictures" | "C:/Users/<USER>/Pictures" |
| TempLocation | randomly generated by the OS | "C:/Users/<USER>/AppData/Local/Temp" |
| HomeLocation | "~" | "C:/Users/<USER>" |
| DataLocation | "~/Library/Application Support/<APPNAME>", "/Library/Application Support/<APPNAME>". "<APPDIR>/../Resources" | "C:/Users/<USER>/AppData/Local/<APPNAME>", "C:/ProgramData/<APPNAME>", "<APPDIR>", "<APPDIR>/data", "<APPDIR>/data/<APPNAME>" |
| CacheLocation | "~/Library/Caches/<APPNAME>", "/Library/Caches/<APPNAME>" | "C:/Users/<USER>/AppData/Local/<APPNAME>/cache" |
| GenericDataLocation | "~/Library/Application Support", "/Library/Application Support" | "C:/Users/<USER>/AppData/Local", "C:/ProgramData", "<APPDIR>", "<APPDIR>/data" |
| RuntimeLocation | "~/Library/Application Support" | "C:/Users/<USER>" |
| ConfigLocation | "~/Library/Preferences" | "C:/Users/<USER>/AppData/Local/<APPNAME>", "C:/ProgramData/<APPNAME>" |
| GenericConfigLocation | "~/Library/Preferences" | "C:/Users/<USER>/AppData/Local", "C:/ProgramData" |
| DownloadLocation | "~/Downloads" | "C:/Users/<USER>/Documents" |
| GenericCacheLocation | "~/Library/Caches", "/Library/Caches" | "C:/Users/<USER>/AppData/Local/cache" |
| AppDataLocation | "~/Library/Application Support/<APPNAME>", "/Library/Application Support/<APPNAME>". "<APPDIR>/../Resources" | "C:/Users/<USER>/AppData/Roaming/<APPNAME>", "C:/ProgramData/<APPNAME>", "<APPDIR>", "<APPDIR>/data", "<APPDIR>/data/<APPNAME>" |
| AppLocalDataLocation | "~/Library/Application Support/<APPNAME>", "/Library/Application Support/<APPNAME>". "<APPDIR>/../Resources" | "C:/Users/<USER>/AppData/Local/<APPNAME>", "C:/ProgramData/<APPNAME>", "<APPDIR>", "<APPDIR>/data", "<APPDIR>/data/<APPNAME>" |
| AppConfigLocation | "~/Library/Preferences/<APPNAME>" | "C:/Users/<USER>/AppData/Local/<APPNAME>", "C:/ProgramData/<APPNAME>" |
Linux系统的目录路径说明：
| Path type | Linux |
| DesktopLocation | "~/Desktop" |
| DocumentsLocation | "~/Documents" |
| FontsLocation | "~/.fonts" |
| ApplicationsLocation | "~/.local/share/applications", "/usr/local/share/applications", "/usr/share/applications" |
| MusicLocation | "~/Music" |
| MoviesLocation | "~/Videos" |
| PicturesLocation | "~/Pictures" |
| TempLocation | "/tmp" |
| HomeLocation | "~" |
| DataLocation | "~/.local/share/<APPNAME>", "/usr/local/share/<APPNAME>", "/usr/share/<APPNAME>" |
| CacheLocation | "~/.cache/<APPNAME>" |
| GenericDataLocation | "~/.local/share", "/usr/local/share", "/usr/share" |
| RuntimeLocation | "/run/user/<USER>" |
| ConfigLocation | "~/.config", "/etc/xdg" |
| GenericConfigLocation | "~/.config", "/etc/xdg" |
| DownloadLocation | "~/Downloads" |
| GenericCacheLocation | "~/.cache" |
| AppDataLocation | "~/.local/share/<APPNAME>", "/usr/local/share/<APPNAME>", "/usr/share/<APPNAME>" |
| AppLocalDataLocation | "~/.local/share/<APPNAME>", "/usr/local/share/<APPNAME>", "/usr/share/<APPNAME>" |
| AppConfigLocation | "~/.config/<APPNAME>", "/etc/xdg/<APPNAME>" |
Android、IOS系统的目录路径说明：
| Path type | Android | iOS |
| DesktopLocation | "<APPROOT>/files" | "<APPROOT>/Documents/Desktop" |
| DocumentsLocation | "<USER>/Documents", "<USER>/<APPNAME>/Documents" | "<APPROOT>/Documents" |
| FontsLocation | "/system/fonts" (not writable) | "<APPROOT>/Library/Fonts" |
| ApplicationsLocation | not supported (directory not readable) | not supported |
| MusicLocation | "<USER>/Music", "<USER>/<APPNAME>/Music" | "<APPROOT>/Documents/Music" |
| MoviesLocation | "<USER>/Movies", "<USER>/<APPNAME>/Movies" | "<APPROOT>/Documents/Movies" |
| PicturesLocation | "<USER>/Pictures", "<USER>/<APPNAME>/Pictures" | "<APPROOT>/Documents/Pictures", "assets-library://" |
| TempLocation | "<APPROOT>/cache" | "<APPROOT>/tmp" |
| HomeLocation | "<APPROOT>/files" | "<APPROOT>" (not writable) |
| DataLocation | "<APPROOT>/files", "<USER>/<APPNAME>/files" | "<APPROOT>/Library/Application Support" |
| CacheLocation | "<APPROOT>/cache", "<USER>/<APPNAME>/cache" | "<APPROOT>/Library/Caches" |
| GenericDataLocation | "<USER>" | "<APPROOT>/Documents" |
| RuntimeLocation | "<APPROOT>/cache" | not supported |
| ConfigLocation | "<APPROOT>/files/settings" | "<APPROOT>/Library/Preferences" |
| GenericConfigLocation | "<APPROOT>/files/settings" (there is no shared settings) | "<APPROOT>/Library/Preferences" |
| DownloadLocation | "<USER>/Downloads", "<USER>/<APPNAME>/Downloads" | "<APPROOT>/Documents/Downloads" |
| GenericCacheLocation | "<APPROOT>/cache" (there is no shared cache) | "<APPROOT>/Library/Caches" |
| AppDataLocation | "<APPROOT>/files", "<USER>/<APPNAME>/files" | "<APPROOT>/Library/Application Support" |
| AppConfigLocation | "<APPROOT>/files/settings" | "<APPROOT>/Library/Preferences/<APPNAME>" |
| AppLocalDataLocation | "<APPROOT>/files", "<USER>/<APPNAME>/files" | "<APPROOT>/Library/Application Support" |
每个枚举的功能介绍：
| Constant | Value | Description |
| QStandardPaths::DesktopLocation | 0 | Returns the user's desktop directory. This is a generic value. On systems with no concept of a desktop, this is the same as QStandardPaths::HomeLocation. |
| QStandardPaths::DocumentsLocation | 1 | Returns the directory containing user document files. This is a generic value. The returned path is never empty. |
| QStandardPaths::FontsLocation | 2 | Returns the directory containing user's fonts. This is a generic value. Note that installing fonts may require additional, platform-specific operations. |
| QStandardPaths::ApplicationsLocation | 3 | Returns the directory containing the user applications (either executables, application bundles, or shortcuts to them). This is a generic value. Note that installing applications may require additional, platform-specific operations. Files, folders or shortcuts in this directory are platform-specific. |
| QStandardPaths::MusicLocation | 4 | Returns the directory containing the user's music or other audio files. This is a generic value. If no directory specific for music files exists, a sensible fallback for storing user documents is returned. |
| QStandardPaths::MoviesLocation | 5 | Returns the directory containing the user's movies and videos. This is a generic value. If no directory specific for movie files exists, a sensible fallback for storing user documents is returned. |
| QStandardPaths::PicturesLocation | 6 | Returns the directory containing the user's pictures or photos. This is a generic value. If no directory specific for picture files exists, a sensible fallback for storing user documents is returned. |
| QStandardPaths::TempLocation | 7 | Returns a directory where temporary files can be stored. The returned value might be application-specific, shared among other applications for this user, or even system-wide. The returned path is never empty. |
| QStandardPaths::HomeLocation | 8 | Returns the user's home directory (the same as QDir::homePath()). On Unix systems, this is equal to the HOME environment variable. This value might be generic or application-specific, but the returned path is never empty. |
| QStandardPaths::DataLocation | 9 | Returns the same value as AppLocalDataLocation. This enumeration value is deprecated. Using AppDataLocation is preferable since on Windows, the roaming path is recommended. |
| QStandardPaths::CacheLocation | 10 | Returns a directory location where user-specific non-essential (cached) data should be written. This is an application-specific directory. The returned path is never empty. |
| QStandardPaths::GenericCacheLocation | 15 | Returns a directory location where user-specific non-essential (cached) data, shared across applications, should be written. This is a generic value. Note that the returned path may be empty if the system has no concept of shared cache. |
| QStandardPaths::GenericDataLocation | 11 | Returns a directory location where persistent data shared across applications can be stored. This is a generic value. The returned path is never empty. |
| QStandardPaths::RuntimeLocation | 12 | Returns a directory location where runtime communication files should be written, like Unix local sockets. This is a generic value. The returned path may be empty on some systems. |
| QStandardPaths::ConfigLocation | 13 | Returns a directory location where user-specific configuration files should be written. This may be either a generic value or application-specific, and the returned path is never empty. |
| QStandardPaths::DownloadLocation | 14 | Returns a directory for user's downloaded files. This is a generic value. If no directory specific for downloads exists, a sensible fallback for storing user documents is returned. |
| QStandardPaths::GenericConfigLocation | 16 | Returns a directory location where user-specific configuration files shared between multiple applications should be written. This is a generic value and the returned path is never empty. |
| QStandardPaths::AppDataLocation | 17 | Returns a directory location where persistent application data can be stored. This is an application-specific directory. To obtain a path to store data to be shared with other applications, use QStandardPaths::GenericDataLocation. The returned path is never empty. On the Windows operating system, this returns the roaming path. This enum value was added in Qt 5.4. |
| QStandardPaths::AppLocalDataLocation | DataLocation | Returns the local settings path on the Windows operating system. On all other platforms, it returns the same value as AppDataLocation. This enum value was added in Qt 5.4. |
| QStandardPaths::AppConfigLocation | 18 | Returns a directory location where user-specific configuration files should be written. This is an application-specific directory, and the returned path is never empty. This enum value was added in Qt 5.5. |
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