Qt程序适配4K分辨率高清屏幕

//适配高清屏幕
    #if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
        QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
    #endif

#include "mainwindow.h"

#include <QApplication>

int main(int argc, char *argv[])
{
    //适配高清屏幕
    #if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
        QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
    #endif

    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}