【Qt】通过QtCreator源码学习Qt（六）：命令行参数解析实现_郭老二

参考下大神的命令行参数解析是如何是实现的

//使用const char []代替宏定义字符串，我以前都是用const QString，想想好傻
const char SETTINGS_OPTION[] = "-settingspath";
const char INSTALL_SETTINGS_OPTION[] = "-installsettingspath";
const char PLUGINPATH_OPTION[] = "-pluginpath";
const char TEST_OPTION[] = "-test";
//保存参数的结构体
struct Options
{
    QString settingsPath;
    QString installSettingsPath;
    QStringList customPluginPaths;
    std::vector<char *> appArguments;
    bool hasTestOption = false;
};
Options parseCommandLine(int argc, char *argv[])
{
    Options options;
    auto it = argv;
    const auto end = argv + argc;
    while (it != end) {
        const auto arg = QString::fromLocal8Bit(*it);
        const bool hasNext = it + 1 != end;
        const auto nextArg = hasNext ? QString::fromLocal8Bit(*(it + 1)) : QString();

        if (arg == SETTINGS_OPTION && hasNext) {
            ++it;
            options.settingsPath = QDir::fromNativeSeparators(nextArg);
        } else if (arg == INSTALL_SETTINGS_OPTION && hasNext) {
            ++it;
            options.installSettingsPath = QDir::fromNativeSeparators(nextArg);
        } else if (arg == PLUGINPATH_OPTION && hasNext) {
            ++it;
            options.customPluginPaths += QDir::fromNativeSeparators(nextArg);
        } else { // arguments that are still passed on to the application
            if (arg == TEST_OPTION)
                options.hasTestOption = true;
            options.appArguments.push_back(*it);
        }
        ++it;
    }
    return options;
}
//使用const char []