i.mx287学习笔记5-Time

绝代码农

1.网络时间接口下面介绍几个常用的时间同步服务器的域名及IP地址：

域名	IP地址
time-a.nist.gov	129.6.15.28
time-b.nist.gov	129.6.15.29
time-a.timefreq.bldrdoc.gov	132.163.4.101
time-b.timefreq.bldrdoc	132.163.4.102
time-c.timefreq.bldrdoc.gov	132.163.4.103
utcnist.colorado.edu	128.138.140.44
time.nist.gov	192.43.244.18
time-nw.nist.gov	131.107.1.10
nist1.datum.com	66.243.43.21
nist1-dc.glassey.com	216.200.93.8
nist1-ny.glassey.com	208.184.49.9
nist1-sj.glassey.com	207.126.98.204
nist1.aol-ca.truetime.com	207.200.81.113
nist1.aol-va.truetime.com	205.188.185.33
国家授时	210.72.145.44

 
2.QT电脑端测试

源码

QStringList net_time;
  QTcpSocket *socket = new QTcpSocket();
  socket->connectToHost("time.nist.gov", 13);
  if (socket->waitForConnected())
  {
    if (socket->waitForReadyRead())
    {
      QString str(socket->readAll());
      str = str.trimmed();
      str = str.section(" ", 1, 2);
      qDebug() <<"Time  :"<< str;
    }
  }
  else
  {
    qDebug("Connected:err");
  }
  socket->close();
  delete socket;

3.显示系统时间初始化

QTimer *timer = new QTimer(this);
  connect(timer,SIGNAL(timeout()),this,SLOT(timerUpdate()));
  timer->start(1000);

显示：

void MainWindow::timerUpdate(void)
{
  QDateTime time = QDateTime::currentDateTime();
  QString str = time.toString("yyyy-MM-dd hh:mm:ss dddd");
  ui->label->setText(str);
}

效果：

4.开启定时器初始化

qsrand(time(0));
  startTimer(1000);

源码

void MainWindow::timerEvent(QTimerEvent *t)
{
  *t =*t;
  QString ab = QString::number(count);
  ui->label_2->setText(ab);
  count++;
}

效果，1秒自加一次