QT Program Self-adapting screen size

QT Program Adaptive Screen Size method:

This->setminimumsize (640,480); Set the minimum window to 5.5-inch screen, determine the minimum size of the interface, can be used or not

Self-adapting screen size

    qdesktopwidget* desktopwidget = qapplication::d esktop ();

    Get the available desktop size

    Qrect deskrect = Desktopwidget->availablegeometry ();

    Resize (Deskrect.width (), Deskrect.height ());

    Get device Screen Size

    Qrect screenrect = Desktopwidget->screengeometry ();

    Resize (Screenrect.width (), Screenrect.height ()); Resize is a virtual function that needs to be rewritten (re-implemented) in the sequence

    This->showmaximized (); Maximized, resulting in a 3-time GUI redraw