Solve the problem of QString Chinese garbled in qt

1. Set QTextCodec in main.cpp
2. QString uses the static method fromLocal8Bit(char*)
   for the first place, which can be set as follows in main.cpp:

#include "MainWindow.h"

#include <QApplication>
#include <QTextCodec>

int main(int argc, char *argv[])
{
    
    
    QApplication a(argc, argv);
    QTextCodec* codec = QTextCodec::codecForName("GB2312");
    QTextCodec::setCodecForLocale(codec);
    MainWindow w;
    w.show();
    return a.exec();
}

For the second place, the following method is used in the char* that contains Chinese:

QString::fromLocal8Bit(char*)

In the place where QString needs to be passed in, if Chinese is included, the settings in the above two places are required.