有没有办法从 QML WorkerScript 运行 C++?

You don't need WorkerScript, nor is this its intended use. And since your code is C++ anyway, all you need is QThread and QObject.

这是一个简单的例子:

class Worker : public QObject {
    Q_OBJECT
  public slots:
    void doWork() {
      int i = 0;
      while (i < 100) {
        result(i++);
        std::this_thread::sleep_for(std::chrono::milliseconds(500));
      }
    }
  signals:
    void result(int r);
};

class Controller : public QObject {
    Q_OBJECT
  public:
    Controller() {
      w = new Worker;
      t = new QThread;
      w->moveToThread(t);
      connect(this, SIGNAL(start()), w, SLOT(doWork()));
      connect(w, SIGNAL(result(int)), this, SIGNAL(result(int)));
      t->start();
    }
  private:
    Worker * w;
    QThread * t;
  signals:
    void start();
    void result(int r);
};

// in main.cpp
  Controller cw;
  engine.rootContext()->setContextProperty("Work", &cw);
  engine.load(QUrl(QStringLiteral("qrc:/main.qml"))); // load main qml


// QML

  Column {
    Button {
      id: start
      onClicked: Work.start()
    }
    Text {
      id: res
    }
  }

  Connections {
    target: Work
    onResult: res.text = r
  }

它是一个简单的阻塞工作者，它将阻塞其线程大约 50 秒，但仍然能够发出将在 QML 端更新的结果，同时保持 GUI 线程空闲.请注意，一旦调用了工作函数，就不能以任何方式中断、暂停或控制它，如果需要，您将必须实现 非阻塞工作者.也不需要 C++ 控制器作为 QML 和线程对象"之间的中介，因为 QML 似乎不能直接与这些对象相处.