Qt 正则表达式限制输入字符不重复

最新推荐文章于 2024-04-05 18:20:54 发布

Pejay23

最新推荐文章于 2024-04-05 18:20:54 发布

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分类专栏： Qt

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派生QValidate 重写虚函数

QValidator::State CKMValidator::validate ( QString & input, int & pos ) const
{
    if(input.isEmpty()) return QValidator::Acceptable;
    QChar chLast = input.at(pos - 1);
    int count = input.count(chLast);
    if(count >= 2) return QValidator::Invalid;
    return QValidator::Acceptable;
}


    ui->lineEdit_format_content->setValidator((new CKMValidator(ui->lineEdit_format_content)));

剔除非字母和数字的 字符
if(input.isEmpty()) return QValidator::Acceptable;
    QChar chLast = input.at(pos - 1);
    if(!chLast.isLetterOrNumber())return QValidator::Invalid;
    int count = input.count(chLast);
    if(count >= 2) return QValidator::Invalid;
    return QValidator::Acceptable;