10.10 Qt定时器和Tcp通信

闹钟

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    timer=new QTimer(this);

    connect(timer,&QTimer::timeout,this,&Widget::updatetime_slot);
    ui->startbtn->setDefault(true);

    timer->start(1000);
    //updatetime_slot();
}

Widget::~Widget()
{
    delete ui;
}

void Widget::updatetime_slot()
{
    QString currenttime=QDateTime::currentDateTime().toString("hh:mm:ss");
    ui->label->setText(currenttime);
}

void Widget::timerEvent(QTimerEvent *event)
{
    if(event->timerId()==clocktimerid1)
    {
        if(ui->lineEdit->text()==ui->label->text())
        {
            ui->textEdit->setText("闹钟响了！！！");
            ui->flaglab->clear();
            ui->startbtn->setEnabled(true);
            this->killTimer(clocktimerid1);
        }
    }
}

void Widget::on_startbtn_clicked()
{
    clocktimerid1=this->startTimer(1000);
    ui->startbtn->setEnabled(false);
    ui->flaglab->setText("闹钟已设定！");
}

void Widget::on_stopbtn_released()
{
    this->killTimer(clocktimerid1);
    ui->startbtn->setEnabled(true);
    ui->flaglab->clear();
}

tcp服务器

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);

    server=new QTcpServer(this); //实例化服务器
    connect(server,&QTcpServer::newConnection,this,&Widget::newconnection_slot);
}

Widget::~Widget()
{
    delete ui;

}


void Widget::on_serverbtn_clicked()
{
    if(ui->serverbtn->text()=="启动服务器")
    {
        quint16 port=ui->portEdit->text().toUInt();//获取输入的端口

        if(!server->listen(QHostAddress::Any,port))
        {
            QMessageBox::information(this,"提示","服务器启动失败!");
            return;
        }
        ui->serverbtn->setText("关闭服务器");
    }else
    {
        server->close();
        ui->serverbtn->setText("启动服务器");
    }
}

void Widget::newconnection_slot()
{
    qDebug()<<"已连接";
    QTcpSocket *s=server->nextPendingConnection();//最新套接字连接地址
    clientlist.push_back(s);//存入链表

    connect(s,&QTcpSocket::readyRead,this,&Widget::readyread_slot);
}

void Widget::readyread_slot()
{
    for(auto val:clientlist)//遍历所有客户端
    {
        if(val->bytesAvailable())//检测套接字中能被读取的字节个数
        {
            QByteArray msg=val->readAll();
            ui->listWidget->addItem(QString::fromLocal8Bit(msg));

            for(auto key:clientlist)//转发给其他客户端
            {
                key->write(msg);
            }
        }
    }
}

Tcp客户端

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    client = new QTcpSocket(this);

    connect(client,&QTcpSocket::connected,this,&Widget::connected_slot);
    connect(client,&QTcpSocket::readyRead,this,&Widget::readyread_slot);
}

Widget::~Widget()
{
    delete ui;
}



void Widget::on_connectbtn_released()
{
    username=ui->nameEdit->text();
    QString ip=ui->IPedit->text();
    quint16 port =ui->portEdit->text().toUInt();

    client->connectToHost(ip,port);

}

void Widget::connected_slot()
{
    QString msg=username+"已连接";
    client->write(msg.toLocal8Bit());
}

void Widget::readyread_slot()
{
    QByteArray msg=client->readAll();
    ui->listWidget->addItem(QString::fromLocal8Bit(msg));
}

void Widget::on_sendbtn_released()
{
    QString msg=username+":"+ui->msgEdit->text();
    client->write(msg.toLocal8Bit());

    ui->msgEdit->clear();
}

void Widget::on_disconnectbtn_released()
{
    QString msg=username+"已断开";
    client->write(msg.toLocal8Bit());
    client->disconnectFromHost();
}

void Widget::disconneted_slot()
{
    QMessageBox::information(this,"断开","断开成功！");
}