暴露c++；QML的自定义类型 我有以下C++自定义对象，希望在QML使用为 EnUM < /C> >类型： #include <QtQml> #include <QApplication> #include <QQmlApplicationEngine> #include "database/uepeoplemodel.h" #include "core/uestatus.h" #include "core/uedatabaseconnectionstatus.h" int main(int argc, char *argv[]) { QApplication app(argc, argv); QQmlApplicationEngine engine; UeStatus* ueApplicationStatus=new UeStatus(qApp); UePeopleModel* uePeopleModel=new UePeopleModel(qApp); QObject::connect(uePeopleModel, SIGNAL(ueSignalDatabaseConnectionChanged(UeDatabaseConnectionStatus::UeTypeDatabaseConnectionStatus)), ueApplicationStatus, SLOT(ueSignalDatabaseConnectionChanged(UeDatabaseConnectionStatus::UeTypeDatabaseConnectionStatus))); uePeopleModel->ueConnectToDatabase(); engine.rootContext()->setContextProperty("uePeopleModel", uePeopleModel); engine.rootContext()->setContextProperty("ueApplicationStatus", ueApplicationStatus); engine.addImageProvider(QLatin1String("uePeopleModel"), uePeopleModel); qmlRegisterUncreatableType<UeDatabaseConnectionStatus::UeTypeDatabaseConnectionStatus>("si.mikroelektronika", 1, 0, "UeTypeDatabaseConnectionStatus", "Database Connection Status"); engine.load(QUrl(QStringLiteral("qrc:/main.qml"))); return app.exec(); } #包括 #包括 #包括 #包括“database/uepeoplemodel.h” #包括“core/uestatus.h” #包括“core/uedatabaseconnectionstatus.h” int main（int argc，char*argv[]） { QApplication应用程序（argc、argv）； qqmlaplicationengine； UeStatus*ueApplicationStatus=新UeStatus（qApp）； UePeopleModel*UePeopleModel=新的UePeopleModel（qApp）； QObject:：connect（uePeopleModel， 信号（ueSignalDatabaseConnectionChanged（UeDatabaseConnectionStatus:：UeTypeDatabaseConnectionStatus））， UE应用程序状态， 插槽（ueSignalDatabaseConnectionChanged（UeDatabaseConnectionStatus:：UeTypeDatabaseConnectionStatus））； uePeopleModel->ueConnectToDatabase（）； engine.rootContext（）->setContextProperty（“uePeopleModel”， 用户模型）； engine.rootContext（）->setContextProperty（“ueApplicationStatus”， UE（状态）； engine.addImageProvider（QLatin1String（“uePeopleModel”）， 用户模型）； qmlregisteruncreateabletype（“si.mikrolektronika”， 1. 0, “UeTypeDatabaseConnectionStatus”， “数据库连接状态”）； engine.load（QUrl（QStringLiteral（“qrc:/main.qml”））； 返回app.exec（）； }

我在

Linux work002 3.19.0-28-generic#30 Ubuntu SMP Mon Aug 31 15:52:51 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux上遇到以下编译错误（使用
gcc版本4.9.2
）：

在文件中包括从
/opt/QtOpenSource55/5.5/gcc_64/include/QtCore/qobject.h:40:0，
来自/opt/QtOpenSource55/5.5/gcc_64/include/QtCore/qabstractanimation.h:37，
来自/opt/QtOpenSource55/5.5/gcc_64/include/QtCore/QtCore:4，
来自/opt/QtOpenSource55/5.5/gcc_64/include/QtQml/QtQmlDepends:3，
来自/opt/QtOpenSource55/5.5/gcc_64/include/QtQml/QtQml:3，
from../ueBlagajnaClient/main.cpp:1:/opt/QtOpenSource55/5.5/gcc_64/include/QtCore/qobjectdefs.h:88:5:
错误：类定义不能声明为友元
friend Q_DECL_CONSTEXPR const QMetaObject*qt_getEnumMetaObject（ENUM）Q_DECL_NOEXCEPT{return&staticMetaObject；}\
^../ueBlagajnaClient/database/。/core/uedatabaseconnectionstatus.h:17:5:
注意：在宏“Q_ENUM”的展开中
Q_枚举（UeTypeDatabaseConnectionStatus）
^/opt/QtOpenSource55/5.5/gcc_64/include/QtCore/qobjectdefs.h:88:35：
错误：“QMetaObject”既不是函数也不是成员函数；无法
交友
friend Q_DECL_CONSTEXPR const QMetaObject*qt_getEnumMetaObject（ENUM）Q_DECL_NOEXCEPT{return&staticMetaObject；}\
^../ueBlagajnaClient/database/。/core/uedatabaseconnectionstatus.h:17:5:
注意：在宏“Q_ENUM”的展开中
Q_枚举（UeTypeDatabaseConnectionStatus）
^/opt/QtOpenSource55/5.5/gcc_64/include/QtCore/qobjectdefs.h:88:35：
错误：在成员声明末尾应为“；”
friend Q_DECL_CONSTEXPR const QMetaObject*qt_getEnumMetaObject（ENUM）Q_DECL_NOEXCEPT{return&staticMetaObject；}\
^../ueBlagajnaClient/database/。/core/uedatabaseconnectionstatus.h:17:5:
注意：在宏“Q_ENUM”的展开中
Q_枚举（UeTypeDatabaseConnectionStatus）
^/opt/QtOpenSource55/5.5/gcc_64/include/QtCore/qobjectdefs.h:88:73：
错误：ISO C++禁止用“不”声明“qtyGETMeqMeta对象”
类型[-fpermissive]
friend Q_DECL_CONSTEXPR const QMetaObject qt_getEnumMetaObject（ENUM）Q_DECL_NOEXCEPT{return&staticMetaObject；}\
^
../ueBlagajnaClient/database/。/core/uedatabaseconnectionstatus.h:17:5:
注意：在宏“Q_ENUM”的展开中
Q_枚举（UeTypeDatabaseConnectionStatus）
^../ueBlagajnaClient/database/。/core/uedatabaseconnectionstatus.h:In
成员函数'int
UeDatabaseConnectionStatus:：qt_getEnumMetaObject（UeDatabaseConnectionStatus:：UeTypeDatabaseConnectionStatus）'：
/opt/QtOpenSource55/5.5/gcc_64/include/QtCore/qobjectdefs.h:88:101：
错误：无法将“const QMetaObject*”转换为“int*”
friend Q_DECL_CONSTEXPR const QMetaObject qt_getEnumMetaObject（ENUM）Q_DECL_NOEXCEPT{return&staticMetaObject；}\
^
../ueBlagajnaClient/database/。/core/uedatabaseconnectionstatus.h:17:5:
注意：在宏“Q_ENUM”的展开中
Q_枚举（UeTypeDatabaseConnectionStatus）
^在/opt/QtOpenSource55/5.5/gcc_64/include/QtQml/QtQml:9:0中包含的文件中，
来自../ueBlagajnaClient/main.cpp:1:/opt/QtOpenSource55/5.5/gcc_64/include/QtQml/qqml.h:在实例化中
'int qmlregisteruncreateabletype（常量字符，int，int，常量字符*，
常量QString&[带T=
UeDatabaseConnectionStatus:：UeTypeDatabaseConnectionStatus]'：
../ueBlagajnaClient/main.cpp:35:120:此处为必填项
/opt/QtOpenSource55/5.5/gcc_64/include/QtQml/qqml.h:83:59:错误：
“staticMetaObject”不是的成员
'UeDatabaseConnectionStatus:：UeTypeDatabaseConnectionStatus'
const char*className=T:：staticMetaObject.className（）\
^/opt/QtOpenSource55/5.5/gcc_64/include/QtQml/qqml.h:134:5:note:in
宏“QML\u GETTYPENAMES”的扩展
QML_GETTYPENAMES
^在文件i中
class UeTypeDatabaseConnectionStatus: public QObject
{
    Q_OBJECT

public:
    enum StatusEnum
    {
        NOT_CONNECTED=false,
        CONNECTED=true
    }
    Q_ENUM(StatusEnum)
    ...
}

connectionProperty: UeTypeDatabaseConnectionStatus.CONNECTED;