Set a single start QT program in QT

Set the single startup method of the program in QT:

1. Copy the qtsingleapplication directory to the source code directory of the project and add the file to the code.

2. Add the QT-connected Library to the Pro file.

Qt + = Network

3. Code in the main function

# Include <qtsingleapplication>

Qtsingleapplication app (argc, argv );

If (App. isrunning ())
{
App. sendmessage ("raise_window_noop ");
Return exit_success;
}

Set a single start QT program in QT