Question

qt界面植入板字，时钟每30秒刷新一次，平台发送校时命令，使得qt显示时间同步为校时时间

我的程序是这样写的：
QLabel *time;
void time::show_time()
{
QDateTime datetime = QDateTime::currentDateTime();
ui->time->setText(datetime.toString("yyyy-MM-dd HH:mm"));
timer_systime = new QTimer(this);
connect(timer_systime, SIGNAL(timeout()), this, SLOT(refresh_time()));
timer_systime->start(30000);
}
void time::refresh_time()
{
QDateTime datetime = QDateTime::currentDateTime();
ui->time->setText(datetime.toString("yyyy-MM-dd HH:mm"));
｝

校时命令发送后屏就死掉了，跪求各位大虾帮忙

Answer 1

QLabel *time;
void time::show_time()
{
QDateTime datetime = QDateTime::currentDateTime();
ui->time->setText(datetime.toString("yyyy-MM-dd HH:mm"));
timer_systime = new QTimer(this);
connect(timer_systime, SIGNAL(timeout()), this, SLOT(refresh_time()));
timer_systime->setInterval( 30000)
timer_systime->start(30000);
}
void time::refresh_time()
{
QDateTime datetime = QDateTime::currentDateTime();
ui->time->setText(datetime.toString("yyyy-MM-dd HH:mm"));
｝

Answer 2

程序没看出什么问题啊,我觉得应该是ui这个东东是不是没实例化没分配空间啊,要不然就应该是平台相关的问题了.
楼主,把一些语句注释掉,看看问题到底出在哪一句上.