利用Qt元对象特性来对枚举与字符串转换和遍历。
QMetaEnum QMetaEnum::fromType()
注意: 枚举需要用Q_ENUM声明(如下例)。
class Object : public QObject
{
Q_OBJECT
public:
Object();
enum WeekDay {
Monday = 1,
Tuesday,
Wednesday,
Thursday,
Friday,
Saturday,
Sunday
};
Q_ENUM(WeekDay)
};
const char *key(int index) const
const char *valueToKey(int value) const
QMetaEnum metaEnum = QMetaEnum::fromType<Object::WeekDay>();
const char *weekDayStr = metaEnum.valueToKey(Object::Sunday);
qDebug() << weekDayStr;
ok
的值来判断是否正确转换。int keyToValue(const char *key, bool *ok = nullptr) const
QMetaEnum metaEnum = QMetaEnum::fromType<Object::WeekDay>();
bool isOk = false;
Object::WeekDay weekDay = (Object::WeekDay)metaEnum.keyToValue("Sunday",
&isOk);
if (isOk) {
qDebug() << weekDay;
}
QStringList list;
QMetaEnum metaEnum = QMetaEnum::fromType<Object::WeekDay>();
for (int i = 0; i < metaEnum.keyCount(); i++) {
list += metaEnum.valueToKey(metaEnum.value(i));
// Or list += metaEnum.key(i);
}
qDebug() << list;