c++ - Qt 自定义插槽

Question

为什么插槽 Reset() 不起作用？我想要“重置”按钮将边栏的值重置为零。

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

尝试将 Q_OBJECT 添加到类的私有(private)部分。这将导致 moc 创建信号和槽工作所需的元数据。参见 http://doc.qt.io/archives/qt-4.7/qobject.html#Q_OBJECT