string - 如何从Qt中的字符串中删除重音/变音符号？

Question

如何从 Qt 中的字符串中删除变音符号。例如，这个:

QString test = QString::fromUtf8("éçàÖœ");
qDebug() << StringUtil::removeAccents(test);

应该输出:

ecaOoe

Answer 1

Qt 中没有直接的内置解决方案。一个简单的解决方案，应该在大多数情况下工作，是循环遍历字符串并用它们的等效项替换每个字符:

QString StringUtil::diacriticLetters_;
QStringList StringUtil::noDiacriticLetters_;

QString StringUtil::removeAccents(QString s) {
    if (diacriticLetters_.isEmpty()) {
        diacriticLetters_ = QString::fromUtf8("ŠŒŽšœžŸ¥µÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýÿ");
        noDiacriticLetters_ << "S"<<"OE"<<"Z"<<"s"<<"oe"<<"z"<<"Y"<<"Y"<<"u"<<"A"<<"A"<<"A"<<"A"<<"A"<<"A"<<"AE"<<"C"<<"E"<<"E"<<"E"<<"E"<<"I"<<"I"<<"I"<<"I"<<"D"<<"N"<<"O"<<"O"<<"O"<<"O"<<"O"<<"O"<<"U"<<"U"<<"U"<<"U"<<"Y"<<"s"<<"a"<<"a"<<"a"<<"a"<<"a"<<"a"<<"ae"<<"c"<<"e"<<"e"<<"e"<<"e"<<"i"<<"i"<<"i"<<"i"<<"o"<<"n"<<"o"<<"o"<<"o"<<"o"<<"o"<<"o"<<"u"<<"u"<<"u"<<"u"<<"y"<<"y";
    }

    QString output = "";
    for (int i = 0; i < s.length(); i++) {
        QChar c = s[i];
        int dIndex = diacriticLetters_.indexOf(c);
        if (dIndex < 0) {
            output.append(c);
        } else {
            QString replacement = noDiacriticLetters_[dIndex];
            output.append(replacement);
        }
    }

    return output;
}

请注意 noDiacriticLetters_必须是 QStringList因为一些带有变音符号的字符可以匹配两个单个字符。例如 œ => oe