我正在学习 QML 与 Qt 并将 enum class
传递给 qml
会遇到一些麻烦 .
当我使用带有 int
参数的信号时 - 它没问题,代码工作得很好 .
但是, and here the trouble ,如果我使用带有一些 enum class
参数的信号,我在qml信号处理程序中有 undefined
值 . 我试图通过 qmlRegisterType
注册 enum class
但它不起作用 . 我将非常感谢你的帮助 .
这里的代码:
Some Helper
class
class Helper : public QObject
{
Q_OBJECT
Q_ENUMS(Requester)
Q_ENUMS(JANSWER)
public:
enum class Requester {
ReqLogin,
ReqNull,
ReqSave,
ReqError,
ReqUnknown
};
enum class JANSWER {
OK,
Complete,
Error,
Unknown
};
};
main.cpp
int main(int argc, char *argv[])
{
QGuiApplication app(argc, argv);
qmlRegisterType<JsonPackWorker>("com.jsonpackworker", 1, 0, "JsonPackWorker");
qmlRegisterType<Helper>("com.Helper", 1, 0, "Helper");
QQmlApplicationEngine engine;
engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
return app.exec();
}
JsonPackWorker.h
class JsonPackWorker : public QObject
{
Q_OBJECT
public:
<...>
signals:
<...>
void sendAnswer(Helper::Requester req, Helper::JANSWER answer);
public slots:
<...>
};
Somewehere in JsonPackWorker.cpp
emit sendAnswer(Helper::Requester::ReqNull, Helper::JANSWER::OK);
main.qml
<...>
import com.jsonpackworker 1.0
import com.Helper 1.0
ApplicationWindow {
id: mainWindow
// Requests in answers
property int reqLogin: Helper.ReqLogin
<...>
JsonPackWorker {
id: packWorker
<...>
onSendAnswer: {
// Here I've got undefined undefined if there enum class parameters
console.log(req + " " + answer)
switch(req) {
case reqLogin: loginDial.checkLogin(answer)
break;
default:
}
}
}
}
1 回答
问题发生在
Helper
类(感谢Qt社区) .