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
原文地址：https://blog.csdn.net/jijie_ming/article/details/140668596
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