QML can't call static member function of C++ class

[Jazzy]

C++ header file:

class Worker: public Object
{
Q_OBJECT
public:
     explicit Worker(QObject *parent = nullptr);
    Q_INVOKABLE static Worker fromJsonString(const QString &jsonString);
}

register Worker class type in my main.cpp:

qmlRegisterType<Worker>("com.abc", 1, 0, "Worker");

qml file:

import com.abc 1.0
var worker = Worker. fromJsonString(jsonString) 

when I run the program, output following error message:

TypeError: Property 'fromJsonString' of object [object Object] is not a function

what wrong with my code?

[KroMignon]

@Jazzy You miss to add Q_OBJECT and to declare fromJsonString() as public::

class Worker: public Object
{
    Q_OBJECT

public:
     explicit Worker(QObject *parent = nullptr);
    Q_INVOKABLE static Worker fromJsonString(const QString &jsonString);
}

[GrecKo]

You need an instance of an object to call a function in QML, so a static function doesn't make a lot of sense in QML.

In your case you might want a singleton type acting as a Worker factory.

[small_bird]

@KroMignon whether I am wrong， it is said that your cold in the same with his, both have symbol Q_OBJECT.