Qt函数名使用方法有哪些

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函数名

    //判断IP地址及端口是否在线    static bool ipLive(const QString &ip, int port, int timeout = 1000);    //获取网页所有源代码    static QString getHtml(const QString &url);    //获取本机公网IP地址    static QString getNetIP(const QString &webCode);    //获取本机IP    static QString getLocalIP();    //Url地址转为IP地址    static QString urlToIP(const QString &url);    //字符串补全    static QString getValue(quint8 value);    //判断是否通外网    static bool isWebOk();

函数体

bool QUIHelper::ipLive(const QString &ip, int port, int timeout){    //局部的事件循环,不卡主界面    QEventLoop eventLoop;    //设置超时    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 << ip;        }    }    //优先取192开头的IP,如果获取不到IP则取127.0.0.1    QString ip = "127.0.0.1";    foreach (QString str, ips) {        if (str.startsWith("192.168.1") || str.startsWith("192")) {            ip = str;            break;        }    }    return ip;}QString QUIHelper::urlToIP(const QString &url){    QHostInfo host = QHostInfo::fromName(url);    return host.addresses().at(0).toString();}QString QUIHelper::getValue(quint8 value){    QString result = QString::number(value);    if (result.length() <= 1) {        result = QString("0%1").arg(result);    }    return result;}bool QUIHelper::isWebOk(){    //能接通百度IP说明可以通外网    return ipLive("115.239.211.112", 80);}

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