问Qt (C++)日志中填充"Widget (address)没有名为(Var)的属性“

EN

QMenu(0x21aef3db1c0) does not have a property named "myVar"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    // code here
}

QColor MainWindow::getMyVar() const
{
    return myVar;
}

void MainWindow::setMyVar(QColor c)
{
    myVar = c;
}

MainWindow::~MainWindow()
{
}

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

class MainWindow : public QMainWindow
{
    Q_OBJECT
    Q_PROPERTY(QColor myVar READ getMyVar WRITE setMyVar DESIGNABLE true)

public:
    MainWindow(QWidget *parent = 0);
    ~MainWindow();
    QColor getMyVar() const;
    void setMyVar(QColor c);
private:
    QColor myVar;
};

#endif // MAINWINDOW_H

* {
    qproperty-myVar: red;
}