QTemporaryDir ¶

概要 ¶

详细描述 ¶

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.

范例：

// 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 applicationName() (otherwise qt_temp ) and will be placed into the temporary path as returned by 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.

另请参阅

tempPath() QDir QTemporaryFile

class QTemporaryDir ¶

QTemporaryDir(templateName)

param templateName

unicode

构造 QTemporaryDir using as template the application name returned by applicationName() (otherwise qt_temp ). The directory is stored in the system’s temporary directory, tempPath() .

另请参阅

tempPath()

PySide2.QtCore.QTemporaryDir. autoRemove ( ) ¶

返回类型

bool

返回 true 若 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.

另请参阅

setAutoRemove() remove()

PySide2.QtCore.QTemporaryDir. errorString ( ) ¶

返回类型

unicode

若 isValid() 返回 false , this function returns the error string that explains why the creation of the temporary directory failed. Otherwise, this function return an empty string.

PySide2.QtCore.QTemporaryDir. filePath ( fileName ) ¶

参数

fileName – unicode

返回类型

unicode

Returns 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 cleanPath() ). Absolute paths are not allowed.

PySide2.QtCore.QTemporaryDir. isValid ( ) ¶

返回类型

bool

返回 true 若 QTemporaryDir was created successfully.

PySide2.QtCore.QTemporaryDir. path ( ) ¶

返回类型

unicode

Returns the path to the temporary directory. Empty if the QTemporaryDir could not be created.

PySide2.QtCore.QTemporaryDir. remove ( ) ¶

返回类型

bool

Removes the temporary directory, including all its contents.

返回 true if removing was successful.

PySide2.QtCore.QTemporaryDir. setAutoRemove ( b ) ¶

参数

b – bool

设置 QTemporaryDir into auto-remove mode if b 为 true。

Auto-remove is on by default.

另请参阅

autoRemove() remove()