Qt自定義插槽

Question

爲什麼插槽Reset（）不起作用？我想要按鈕「復位」將邊框的值重置爲零。

class MySlider : public QSlider 
{ 
    public: 
    MySlider(Qt::Orientation orientation, QWidget *parent = 0) : QSlider(orientation parent){} 

    public slots: 
    void Reset() 
    { 
    this->setValue(0); 
    } 
}; 

//it doesnt work when i try this 

MySlider * Slider = new MySlider(Qt::Horizontal, this); 

QPushButton *Reset = new QPushButton(tr("Reset"), this); 

connect(Reset, SIGNAL(clicked()), Slider, SLOT(Reset())); 

Answer 1

嘗試將Q_OBJECT添加到班級的私人部分。這將導致moc創建信號和插槽工作所需的元數據。請參閱http://doc.qt.io/archives/qt-4.7/qobject.html#Q_OBJECT