The QMetaEnum 类提供枚举器的有关元数据。 更多...
| 头： | #include <QMetaEnum> |
| bool | isFlag () const |
| bool | isValid () const |
| const char * | key (int index ) const |
| int | keyCount () const |
| int | keyToValue (const char * key ) const |
| int | keysToValue (const char * keys ) const |
| const char * | name () const |
| const char * | scope () const |
| int | value (int index ) const |
| const char * | valueToKey (int value ) const |
| QByteArray | valueToKeys (int value ) const |
The QMetaEnum 类提供枚举器的有关元数据。
使用 name () for the enumerator's name. The enumerator's keys (names of each enumerated item) are returned by key ()；使用 keyCount () 能查找按键数。 isFlag () returns whether the enumerator is meant to be used as a flag, meaning that its values can be combined using the OR operator.
The conversion functions keyToValue (), valueToKey (), keysToValue ()，和 valueToKeys () allow conversion between the integer representation of an enumeration or set value and its literal representation. The scope () function returns the class scope this enumerator was declared in.
另请参阅 QMetaObject , QMetaMethod ，和 QMetaProperty .
Returns true if this enumerator is used as a flag; otherwise returns false.
When used as flags, enumerators can be combined using the OR operator.
另请参阅 keysToValue () 和 valueToKeys ().
Returns true if this enum is valid (has a name); otherwise returns false.
另请参阅 name ().
Returns the key with the given index , or 0 if no such key exists.
另请参阅 keyCount (), value ()，和 valueToKey ().
返回按键数。
另请参阅 key ().
Returns the integer value of the given enumeration key ，或 -1 若 key is not defined.
For flag types, use keysToValue ().
另请参阅 valueToKey (), isFlag ()，和 keysToValue ().
Returns the value derived from combining together the values of the keys using the OR operator, or -1 if keys is not defined. Note that the strings in keys must be '|'-separated.
另请参阅 isFlag (), valueToKey ()，和 valueToKeys ().
Returns the name of the enumerator (without the scope).
例如，
Qt::AlignmentFlag
enumeration has
AlignmentFlag
as the name and
Qt
as the scope.
Returns the scope this enumerator was declared in.
例如，
Qt::AlignmentFlag
enumeration has
Qt
as the scope and
AlignmentFlag
as the name.
另请参阅 name ().
Returns the value with the given index ; or returns -1 if there is no such value.
另请参阅 keyCount (), key ()，和 keyToValue ().
Returns the string that is used as the name of the given enumeration value , or 0 if value is not defined.
For flag types, use valueToKeys ().
另请参阅 isFlag () 和 valueToKeys ().
Returns a byte array of '|'-separated keys that represents the given value .
另请参阅 isFlag (), valueToKey ()，和 keysToValue ().
