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Run setup. Open license folder, copy the. The use of other separators e. You can check for a file's existence using exists , and remove a file using remove. The file is opened with open , closed with close , and flushed with flush. QFile also inherits getChar , putChar , and ungetChar , which work one character at a time. The size of the file is returned by size. You can get the current file position using pos , or move to a new file position using seek.

If you've reached the end of the file, atEnd returns true. By default, QFile assumes binary, i. The next example uses QTextStream to read a text file line by line:.

By default, it assumes that the user system's local 8-bit encoding is used e. This can be changed using QTextStream::setCodec. See the class documentation for details.

On Unix, these file names are converted to an 8-bit encoding. On Unix, there are some special system files e. In this case, however, you cannot use atEnd to determine if there is more data to read since atEnd will return true for a file that claims to have size 0. Instead, you should either call readAll , or call read or readLine repeatedly until no more data can be read. This implementation detail means that QFile is not suitable for reading and writing certain types of files, such as device files on Unix platforms.

File permissions are handled differently on Unix-like systems and Windows. In a non writable directory on Unix-like systems, files cannot be created. This is not always the case on Windows, where, for instance, the 'My Documents' directory usually is not writable, but it is still possible to create files in it.

Qt's understanding of file permissions is limited, which affects especially the QFile::setPermissions function. Constructs a new file object with the given parent to represent the file with the specified name. If the copied file is a symbolic link symlink , the file it refers to is copied, not the link itself.

With the exception of permissions, which are copied, no other file metadata is copied. Note that if a file with the name newName already exists, copy returns false. This means QFile will not overwrite it. Returns the Unicode version of the given localFileName. See encodeName for details. Converts fileName to the local 8-bit encoding determined by the user's locale. This is sufficient for file names that the user chooses. Returns true if the file specified by fileName exists; otherwise returns false.

Note: If fileName is a symlink that points to a non-existing file, false is returned. See also fileName and setFileName. Returns the name set by setFileName or to the QFile constructors. Creates a link named linkName that points to the file currently specified by fileName. What a link is depends on the underlying filesystem be it a shortcut on Windows or a symbolic link on Unix.

Returns true if successful; otherwise returns false. This function will not overwrite an already existing entity in the file system; in this case, link will return false and set error to return RenameError. Note: To create a valid link on Windows, linkName must have a. Creates a link named linkName that points to the file fileName. Moves the file specified by fileName to the trash.

Returns true if successful, and sets the fileName to the path at which the file can be found within the trash; otherwise returns false. Note: On systems where the system API doesn't report the location of the file in the trash, fileName will be set to the null string once the file has been moved. On systems that don't have a trash can, this function always returns false. Returns true if successful, and sets pathInTrash if provided to the path at which the file can be found within the trash; otherwise returns false.

Note: On systems where the system API doesn't report the path of the file in the trash, pathInTrash will be set to the null string once the file has been moved.