qt_demoe/widget/framelesswidget/main.cpp

#pragma execution_character_set("utf-8")

#include "frmframelesswidget.h"
#include <QApplication>
#include <QTextCodec>

int main(int argc, char *argv[])
{
#if (QT_VERSION >= QT_VERSION_CHECK(5,0,0))
    QApplication::setAttribute(Qt::AA_Use96Dpi);
#endif
#if (QT_VERSION >= QT_VERSION_CHECK(6,0,0))
    QGuiApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::Floor);
#endif

    QApplication a(argc, argv);
    QFont font;
    font.setFamily("Microsoft Yahei");
    font.setPixelSize(13);
    a.setFont(font);

#if (QT_VERSION < QT_VERSION_CHECK(5,0,0))
#if _MSC_VER
    QTextCodec *codec = QTextCodec::codecForName("gbk");
#else
    QTextCodec *codec = QTextCodec::codecForName("utf-8");
#endif
    QTextCodec::setCodecForLocale(codec);
    QTextCodec::setCodecForCStrings(codec);
    QTextCodec::setCodecForTr(codec);
#else
    QTextCodec *codec = QTextCodec::codecForName("utf-8");
    QTextCodec::setCodecForLocale(codec);
#endif

    frmFramelessWidget w;    
    w.setWindowTitle("无边框窗体 (QQ: 517216493 WX: feiyangqingyun)");
    w.resize(800, 600);
    w.show();

    return a.exec();
}