The QMetaEnum 类提供枚举器的有关元数据。 更多...
| 头： | #include <QMetaEnum> |
| qmake: | QT += core |
| const char * | enumName () const |
| bool | isFlag () const |
| bool | isScoped () const |
| bool | isValid () const |
| const char * | key (int index ) const |
| int | keyCount () const |
| int | keyToValue (const char * key , bool * ok = nullptr) const |
| int | keysToValue (const char * keys , bool * ok = nullptr) 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 |
| QMetaEnum | fromType () |
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 .
返回标志的枚举名称 (在作用域外)。
例如，
Qt::AlignmentFlag
标志拥有
AlignmentFlag
作为枚举名称，但
Alignment
as as the type name. Non flag enums has the same type and enum names.
枚举名称拥有如类型名称的相同作用域。
该函数在 Qt 5.12 引入。
[static]
QMetaEnum
QMetaEnum::
fromType
()
返回 QMetaEnum corresponding to the type in the template parameter. The enum needs to be declared with Q_ENUM .
该函数在 Qt 5.5 引入。
返回
true
若此枚举器被用作标志；否则返回 false。
When used as flags, enumerators can be combined using the OR operator.
另请参阅 keysToValue () 和 valueToKeys ().
返回
true
if this enumerator is declared as a C++11 enum class; otherwise returns false.
该函数在 Qt 5.8 引入。
返回
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 未定义。
若 key is not defined, * ok is set to false; otherwise * ok 被设为 true。
对于标志类型，使用 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.
若 keys is not defined, * ok is set to false; otherwise * ok 被设为 true。
另请参阅 isFlag (), valueToKey ()，和 valueToKeys ().
Returns the name of the type (without the scope).
例如，
Qt::Key
枚举拥有
Key
as the type name and
Qt
as the scope.
For flags this returns the name of the flag type, not the name of the enum type.
另请参阅 isValid (), scope ()，和 enumName ().
Returns the scope this enumerator was declared in.
例如，
Qt::AlignmentFlag
枚举拥有
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 未定义。
对于标志类型，使用 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 ().