Run a function with a delay in QT

Question

I want to create a function, let's say (qDebug() << "result" ;). I want to display the result 2 secs later, the delay must be in this function implemented. In other words :

void MainWindow::my_function()
{
     // Here I need something to make a delay of 2 secs
      qDebug() << "result";
}

Is there a method or something that allows to wait 2 secs and then executes the next line ? I m looking for the easiest method on QT.

Answer 1

my suggestion is to read first why sleep are a bad idea, specially when GUIS are involved.. anyways, you can since qt5

Functions of QThread

void msleep(unsigned long msecs);
void sleep(unsigned long secs);
void usleep(unsigned long usecs);

using this in your code, you can do

void MainWindow::my_function(){
     // Here I need something to make a delay of 2 secs
     sleep(2);
     qDebug() << "result";
}

but as I said before, read 1st, because this will work, but will freeze the main window too, which is a not so nice idea when considering User Experience etc