qt utf gbk

#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))

    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);

    QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);

#endif

#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