These classes are used to handle input and output to and from external devices, processes, files etc. as well as manipulating files and directories.
QAbstractFileEngine | The QAbstractFileEngine class provides an abstraction for accessing the filesystem. |
QAbstractFileEngineHandler | The QAbstractFileEngineHandler class provides a way to register custom file engines with your application. |
QAbstractSocket | The QAbstractSocket class provides the base functionality common to all socket types. |
QAuthenticator | The QAuthenticator class provides an authentication object. |
QBuffer | The QBuffer class provides a QIODevice interface for a QByteArray. |
QClipboard | The QClipboard class provides access to the window system clipboard. |
QDataStream | The QDataStream class provides serialization of binary data to a QIODevice. |
QDir | The QDir class provides access to directory structures and their contents. |
QFile | The QFile class provides an interface for reading from and writing to files. |
QFileInfo | The QFileInfo class provides system-independent file information. |
QFileSystemWatcher | The QFileSystemWatcher class provides an interface for monitoring files and directories for modifications. |
QFtp | The QFtp class provides an implementation of the client side of FTP protocol. |
QHostAddress | The QHostAddress class provides an IP address. |
QHostInfo | The QHostInfo class provides static functions for host name lookups. |
QHttp | The QHttp class provides an implementation of the HTTP protocol. |
QHttpHeader | The QHttpHeader class contains header information for HTTP. |
QHttpRequestHeader | The QHttpRequestHeader class contains request header information for HTTP. |
QHttpResponseHeader | The QHttpResponseHeader class contains response header information for HTTP. |
QIODevice | The QIODevice class is the base interface class of all I/O devices in Qt. |
QImageReader | The QImageReader class provides a format independent interface for reading images from files or other devices. |
QImageWriter | The QImageWriter class provides a format independent interface for writing images to files or other devices. |
QMacPasteboardMime | The QMacPasteboardMime class maps open-standard MIME to Mac flavors. |
QNetworkAddressEntry | The QNetworkAddressEntry class stores one IP address supported by a network interface, along with its associated netmask and broadcast address. |
QNetworkInterface | The QNetworkInterface class provides a listing of the host's IP addresses and network interfaces. |
QNetworkProxy | The QNetworkProxy class provides a network layer proxy. |
QPictureIO | The QPictureIO class contains parameters for loading and saving pictures. |
QProcess | The QProcess class is used to start external programs and to communicate with them. |
QResource | The QResource class provides an interface for reading directly from resources. |
QSettings | The QSettings class provides persistent platform-independent application settings. |
QSignalMapper | The QSignalMapper class bundles signals from identifiable senders. |
QSocketNotifier | The QSocketNotifier class provides support for monitoring activity on a file descriptor. |
QSslCertificate | The QSslCertificate class provides a convenient API for an X509 certificate. |
QSslCipher | The QSslCipher class represents an SSL cryptographic cipher. |
QSslError | The QSslError class provides an SSL error. |
QSslKey | The QSslKey class provides an interface for private and public keys. |
QSslSocket | The QSslSocket class provides an SSL encrypted socket for both clients and servers. |
QTcpServer | The QTcpServer class provides a TCP-based server. |
QTcpSocket | The QTcpSocket class provides a TCP socket. |
QTemporaryFile | The QTemporaryFile class is an I/O device that operates on temporary files. |
QTextIStream | The QTextIStream class is a convenience class for input streams. |
QTextOStream | The QTextOStream class is a convenience class for output streams. |
QTextStream | The QTextStream class provides a convenient interface for reading and writing text. |
QUdpSocket | The QUdpSocket class provides a UDP socket. |
QUrl | The QUrl class provides a convenient interface for working with URLs. |
QUrlInfo | The QUrlInfo class stores information about URLs. |
QWindowsMime | The QWindowsMime class maps open-standard MIME to Window Clipboard formats. |