The QTemporaryDir class creates a unique directory for temporary use. More...
| Header: | #include <QTemporaryDir> |
| CMake: | find_package(Qt6 REQUIRED COMPONENTS Core) target_link_libraries(mytarget PRIVATE Qt6::Core) |
| qmake: | QT += core |
Note: All functions in this class are reentrant.
| QTemporaryDir(QTemporaryDir &&other) | |
| QTemporaryDir(const QString &templatePath) | |
| QTemporaryDir() | |
| QTemporaryDir & | operator=(QTemporaryDir &&other) |
| ~QTemporaryDir() | |
| bool | autoRemove() const |
| QString | errorString() const |
| QString | filePath(const QString &fileName) const |
| bool | isValid() const |
| QString | path() const |
| bool | remove() |
| void | setAutoRemove(bool b) |
| void | swap(QTemporaryDir &other) |
QTemporaryDir is used to create unique temporary directories safely. The directory itself is created by the constructor. The name of the temporary directory is guaranteed to be unique (i.e., you are guaranteed to not overwrite an existing directory), and the directory will subsequently be removed upon destruction of the QTemporaryDir object. The directory name is either auto-generated, or created based on a template, which is passed to QTemporaryDir's constructor.
Example:
// Within a function/method... QTemporaryDir dir; if (dir.isValid()) { // dir.path() returns the unique directory path } // The QTemporaryDir destructor removes the temporary directory // as it goes out of scope.
It is very important to test that the temporary directory could be created, using isValid(). Do not use exists(), since a default-constructed QDir represents the current directory, which exists.
The path to the temporary directory can be found by calling path().
A temporary directory will have some static part of the name and some part that is calculated to be unique. The default path will be determined from QCoreApplication::applicationName() (otherwise qt_temp) and will be placed into the temporary path as returned by QDir::tempPath(). If you specify your own path, a relative path will not be placed in the temporary directory by default, but be relative to the current working directory. In all cases, a random
string will be appended to the path in order to make it unique.
See also QDir::tempPath(), QDir, and QTemporaryFile.
[since 6.4] QTemporaryDir::QTemporaryDir(QTemporaryDir
&&other)Move-constructs a new QTemporaryDir from other.
Note: The moved-from object other is placed in a partially-formed state, in which the only valid operations are destruction and assignment of a new value.
This function was introduced in Qt 6.4.
Constructs a QTemporaryDir with a template of templatePath.
If templatePath is a relative path, the path will be relative to the current working directory. You can use QDir::tempPath() to construct templatePath if you want use the system's temporary directory.
If the templatePath ends with XXXXXX it will be used as the dynamic portion of the directory name, otherwise it will be appended. Unlike QTemporaryFile, XXXXXX in the middle of the template string is not supported.
See also QDir::tempPath().
Constructs a QTemporaryDir using as template the application name returned by QCoreApplication::applicationName() (otherwise qt_temp). The directory
is stored in the system's temporary directory, QDir::tempPath().
See also QDir::tempPath().
[since 6.4] QTemporaryDir &QTemporaryDir::operator=(QTemporaryDir &&other)Move-assigns other to this QTemporaryDir instance.
Note: The moved-from object other is placed in a partially-formed state, in which the only valid operations are destruction and assignment of a new value.
This function was introduced in Qt 6.4.
Destroys the temporary directory object. If auto remove mode was set, it will automatically delete the directory including all its contents.
See also autoRemove().
Returns true if the QTemporaryDir is in auto remove mode. Auto-remove mode will automatically delete the directory from disk upon destruction. This makes it very easy to
create your QTemporaryDir object on the stack, fill it with files, do something with the files, and finally on function return it will automatically clean up after itself.
Auto-remove is on by default.
See also setAutoRemove() and remove().
[since 5.6] QString QTemporaryDir::errorString() constIf isValid() returns false, this function returns the error string that explains why the creation of the temporary directory failed. Otherwise, this function return
an empty string.
This function was introduced in Qt 5.6.
[since 5.9] QString QTemporaryDir::filePath(const QString &fileName) constReturns the path name of a file in the temporary directory. Does not check if the file actually exists in the directory. Redundant multiple separators or "." and ".." directories in fileName are not removed (see QDir::cleanPath()). Absolute paths are not allowed.
This function was introduced in Qt 5.9.
Returns true if the QTemporaryDir was created successfully.
Returns the path to the temporary directory. Empty if the QTemporaryDir could not be created.
Removes the temporary directory, including all its contents.
Returns true if removing was successful.
Sets the QTemporaryDir into auto-remove mode if b is true.
Auto-remove is on by default.
See also autoRemove() and remove().
[since 6.4] void QTemporaryDir::swap(QTemporaryDir
&other)Swaps temporary-dir other with this temporary-dir. This operation is very fast and never fails.
This function was introduced in Qt 6.4.
