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Input/Output and Networking

These classes are used to handle input and output to and from external devices, processes, files etc. as well as manipulating files and directories.

QAbstractFileEngineAbstraction for accessing the filesystem
QAbstractFileEngineHandlerWay to register custom file engines with your application
QBufferQIODevice interface for a QByteArray
QDataStreamSerialization of binary data to a QIODevice
QDirAccess to directory structures and their contents
QFileInterface for reading from and writing to files
QFileInfoSystem-independent file information
QFileSystemWatcherInterface for monitoring files and directories for modifications
QIODeviceThe base interface class of all I/O devices in Qt
QImageReaderFormat independent interface for reading images from files or other devices
QImageWriterFormat independent interface for writing images to files or other devices
QProcessUsed to start external programs and to communicate with them
QProcessEnvironmentHolds the environment variables that can be passed to a program
QResourceInterface for reading directly from resources
QSettingsPersistent platform-independent application settings
QSocketNotifierSupport for monitoring activity on a file descriptor
QTemporaryFileI/O device that operates on temporary files
QTextDocumentWriterFormat-independent interface for writing a QTextDocument to files or other devices
QTextStreamConvenient interface for reading and writing text
QUrlConvenient interface for working with URLs
QUrlInfoStores information about URLs

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Qt 4.6.3