c++ - 翻译在 Qt 中不起作用

Question

我一整天都在谷歌上搜索解决方案并更改我的代码，但没有成功。

基本上，我已将翻译添加到我的应用程序中。它工作正常，除了这里:

QString MainWindow::getMessage(Messages msg) {
    static const char* const messages[] = {
        QT_TR_NOOP("Setting power on"),
        QT_TR_NOOP("Reading ID..."),
        QT_TR_NOOP("Programming..."),
        QT_TR_NOOP("Setting write-protect"),
        QT_TR_NOOP("Finished ok"),
        QT_TR_NOOP("PROGRAMMED OK"),
        QT_TR_NOOP("ERROR!"),
        QT_TR_NOOP("OK"),
        QT_TR_NOOP("The programmer is not connected.\nPlease check the connection."),
        QT_TR_NOOP("Disconnect the board, it is in short!!"),
        QT_TR_NOOP("ERROR: Supply voltage too low (1 Volt is required, Measured: 0.0 Volt)."),
        QT_TR_NOOP("Board is already programmed and write protected."),
        QT_TR_NOOP("Check device connection or there is short."),
        QT_TR_NOOP("Unknown error.")    
    };

    return tr(messages[msg]);
}

但是，我没有得到翻译。翻译文件似乎没问题，UI 翻译应用得很好。我也试过这个:

static const char* const messages[] = {
    QT_TRANSLATE_NOOP("test", "Setting power on"),
    QT_TRANSLATE_NOOP("test", "Reading ID..."),
    QT_TRANSLATE_NOOP("test", "Programming..."),
    QT_TRANSLATE_NOOP("test", "Setting write-protect"),
    QT_TRANSLATE_NOOP("test", "Finished ok"),
    QT_TRANSLATE_NOOP("test", "PROGRAMMED OK"),
    QT_TRANSLATE_NOOP("test", "ERROR!"),
    QT_TRANSLATE_NOOP("test", "OK"),
    QT_TRANSLATE_NOOP("test", "The programmer is not connected.\nPlease check the connection."),
    QT_TRANSLATE_NOOP("test", "Disconnect the board, it is in short!!"),
    QT_TRANSLATE_NOOP("test", "ERROR: Supply voltage too low (1 Volt is required, Measured: 0.0 Volt)."),
    QT_TRANSLATE_NOOP("test", "Board is already programmed and write protected."),
    QT_TRANSLATE_NOOP("test", "Check device connection or there is short."),
    QT_TRANSLATE_NOOP("test", "Unknown error.")
};

然后，我有一个获取消息的方法:

QString MainWindow::getMessage(Messages msg) {
    return qApp->translate("test", messages[msg]); 
}

但它也不起作用。

有什么提示或建议吗？

Answer 1

我在这里找到了真正的问题。通常翻译器安装在 main.cpp 中，因此翻译器对象保留在内存中。但是，就我而言，我是在用户在设置对话框中更改语言后切换翻译器，使用局部变量但 void QCoreApplication::installTranslator ( QTranslator * translationFile ) [static] 需要一个指针。一旦函数退出，该局部变量就会被删除。所以，我在我的类上声明了一个 QTranslator 对象，所以它保存在内存中。