更改程序当前目录¶

有时候经常需要把程序当前执行目录默认换成其他的
qt如下操作
#ifdef Q_OS_WIN
    QString home_path = QStandardPaths::writableLocation(
                            QStandardPaths::AppDataLocation);//当前工作目录
    if (!FileUtil::DirMake(QString("%1").arg(home_path))) {
        qCritical() << "目录初始化错误";
    } else {
        QDir::setCurrent(QString("%1").arg(home_path));
    }
#endif


#ifdef Q_OS_MAC
    QString home_path = QStandardPaths::writableLocation(
                            QStandardPaths::HomeLocation);  //主目录
    if (!FileUtil::DirMake(QString("%1/test").arg(home_path))) {
        qCritical() << "目录初始化错误";
    } else {
        QDir::setCurrent(QString("%1/test").arg(home_path));
    }
#endif

#ifdef Q_OS_LINUX
    QString home_path = QStandardPaths::writableLocation(
                            QStandardPaths::HomeLocation); //主目录
    if (!FileUtil::DirMake(QString("%1/test").arg(home_path))) {
        qCritical() << "目录初始化错误";
    } else {
        QDir::setCurrent(QString("%1/test").arg(home_path));
    }
#endif