Question

我尝试在Qt小部件中实现使用D_ptr的PIMPL方法。

以下代码是我实施的。

class GuiCentralHandler : public QWidget
{
    Q_OBJECT
public:
    GuiCentralHandler (QWidget *parent = 0);
    ~GuiCentralHandler ();

protected:
    GuiCentralHandlerPrivate * const d_ptr;

private: //class methods
    Q_DECLARE_PRIVATE(GuiCentralHandler )
};

GuiCentralHandler ::GuiCentralHandler (QWidget *parent)
    :QWidget(parent),d_ptr(new GuiCentralHandlerPrivate (this))
{
}

GuiCentralHandler ::~GuiCentralHandler ()
{
    Q_D(GuiCentralHandler );
    delete &d_ptr;
}

我的私人d_ptr是

class GuiCentralHandlerPrivate 
{
    Q_DECLARE_PUBLIC(GuiCentralHandlerPrivate )
public:
     GuiCentralHandlerPrivate (GuiCentralHandler *parent);

protected:
    GuiCentralHandler * const q_ptr;
};

GuiCentralHandlerPrivate ::GuiCentralHandlerPrivate (GuiCentralHandler *parent)
    : q_ptr(parent)
{
}

但是当我调用GuiCentralHandler ::~GuiCentralHandler ()的析构函数时它崩溃了。如何从主窗口小部件中删除d_ptr或d_func。请指出我在这个实现中出错的地方。

Answer 1

您应该将指针传递给operator delete而不是指针的地址：

delete d_ptr;

而不是：

delete &d_ptr;

Here，您可以找到有关d指针的信息

使用D_ptr实现析构函数

1 个答案: