Shulou(Shulou.com)06/01 Report--

This article introduces the relevant knowledge of "what is the use of Qt function names?" in the operation of actual cases, many people will encounter such a dilemma, and then let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Function name / / determine whether the IP address and port are online static bool ipLive (const QString & ip, int port, int timeout = 1000); / / get all the source code of the web page static QString getHtml (const QString & url); / / obtain the local public network IP address static QString getNetIP (const QString & webCode); / / obtain the native IP static QString getLocalIP (); / / convert the Url address to IP address static QString urlToIP (const QString & url) / / string completion static QString getValue (quint8 value); / / determine whether to access the extranet static bool isWebOk (); function body bool QUIHelper::ipLive (const QString & ip, int port, int timeout) {/ / local event loop, do not card the main interface QEventLoop eventLoop; / / set timeout QTimer timer; connect (& timer, SIGNAL (timeout ()), & eventLoop, SLOT (quit (); timer.setSingleShot (true) Timer.start (timeout); QTcpSocket tcpSocket; connect (& tcpSocket, SIGNAL (connected ()), & eventLoop, SLOT (quit ()); tcpSocket.connectToHost (ip, port); eventLoop.exec (); bool ok = (tcpSocket.state () = QAbstractSocket::ConnectedState); return ok;} QString QUIHelper::getHtml (const QString & url) {QNetworkAccessManager * manager = new QNetworkAccessManager (); QNetworkReply * reply = manager- > get (QNetworkRequest (QUrl (url); QByteArray responseData QEventLoop eventLoop; QObject::connect (manager, SIGNAL (finished (QNetworkReply *)), & eventLoop, SLOT (quit ()); eventLoop.exec (); responseData = reply- > readAll (); return QString (responseData);} QString QUIHelper::getNetIP (const QString & webCode) {QString web = webCode; web = web.replace (', "); web = web.replace ("\ r ",") Web = web.replace ("\ n", "); QStringList list = web.split ("); QString tar = list.at (3); QStringList ip = tar.split ("="); return ip.at (1);} QString QUIHelper::getLocalIP () {QStringList ips; QList addrs = QNetworkInterface::allAddresses (); foreach (QHostAddress addr, addrs) {QString ip = addr.toString () If (QUIHelper::isIP (ip)) {ips

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