众所周知QIntValidator和QDoubleValidator存在缺陷，最明显的一点就是数据范围不准确。
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| auto intVaildator = new QIntValidator(1,199);
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解决方法：重载validate函数
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| [override virtual] QValidator::State QIntValidator::validate(QString &input, int &pos) const
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具体实现
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| QValidator::State IntValidator::validate(QString &input, int &pos) const
{
const State originalRes = QIntValidator::validate(input, pos);
if (originalRes != Intermediate || input.isEmpty()) {
return originalRes;
}
const auto extracted = locale().toLongLong(input);
if (extracted > 0) {
if (extracted > top() && -extracted < bottom()) {
return Invalid;
}
} else if (extracted < bottom()) {
return Invalid;
}
return originalRes;
}
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